CCAPP AstroParticle Lunch
Here, members of CCAPP, Physics, and Astronomy get together to discuss papers and recent developments in high-energy astrophysics and astroparticle physics, in an informal setting over lunch. Please check the page for details regarding the next meeting.
Organizers:
Lucas Beaufore -- beaufore.2@osu.eduObada Nairat -- nairat.2@osu.eduPaarmita Pandey -- pandey.176@osu.eduFridays from 11:15 am - 12:15 pm (EDT)
Price Place (PRB) & VIA ZOOM
COMING UP:
11:15 am, Friday, May 3
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Characterization of the Astrophysical Diffuse Neutrino Flux using Starting Track Events in IceCube
Gamma-ray Emission from a Young Star Cluster in the Star-Forming Region RCW 38
Testing the Origins of Neutrino Mass with Supernova Neutrino Time Delay
Illuminating Black Hole Shadow with Dark Matter Annihilation
PAST EVENTS:
11:15 am, Friday, April 26
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The Effect of Cosmic Rays on the Observational Properties of the CGM
Neutrino and Gamma-Ray Signatures of Inelastic Dark Matter Annihilating Outside Neutron Stars
Ultra-light Dark Matter Limits from Astrophysical Neutrino Flavor
Combined Pre-Supernova Alert System with Kamland and Super-Kamiokande
11:15 am, Friday, April 12
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The neutrino background from non-jetted active galactic nuclei
DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
Constraints on the X17 boson from IceCube searches for non-standard interactions of neutrinos
11:15 am, Friday, April 5
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Extremal Kerr Black Hole Dark Matter from Hawking Evaporation
Search for a sub-eV sterile neutrino using Daya Bay's full dataset
Characterization of Atmosphere-Skimming Cosmic-Ray Showers in High-Altitude Experiments
11:15 am, Friday, March 29
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11:15 am, Friday, March 22
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Observation of Seven Astrophysical Tau Neutrino Candidates with IceCube
Final state radiation from high and ultrahigh energy neutrino interactions
Atmospheric muons measured with the KM3NeT detectors in comparison with updated numeric predictions
Supernovae Time Profiles as a Probe of New Physics at Neutrino Telescopes
11:15 am, Friday, March 8
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Two 100 TeV neutrinos coincident with the Seyfert galaxy NGC 7469
Observation of Seven Astrophysical Tau Neutrino Candidates with IceCube
The cosmic-ray positron excess and its imprint in the Galactic gamma-ray sky
Improved modeling of in-ice particle showers for IceCube event reconstruction
Searches for beyond-standard-model physics with astroparticle physics instruments
11:15 am, Friday, March 1
Guest: Prof. Phil Hopkins (Caltech)
Galactic Cosmic-ray Scattering due to Intermittent Structures
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Galactic Cosmic-ray Scattering due to Intermittent Structures
Characterization of the Astrophysical Diffuse Neutrino Flux using Starting Track Events in IceCube
Prospects for measuring time variation of astrophysical neutrino sources at dark matter detectors
Search for neutrino emission from the Cygnus Bubble based on LHAASO γ-ray observations
Possible spectral irregularities in the AMS-02 positron spectrum
Neutrino oscillations with atmospheric neutrinos at large liquid argon TPCs
PAST EVENTS:
11:15 am, Friday, February 23
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11:15 am, Friday, February 16
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Constraints on Dark Matter-Dark Energy Scattering from ACT DR6 CMB Lensing
Interpretation of AMS-02 beryllium isotope fluxes using data-driven production cross sections
11:15 am, Friday, February 9
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The Sun and core-collapse supernovae are leading probes of the neutrino lifetime
Indirect Searches for Dark Photon-Photon Tridents in Celestial Objects
11:15 am, Friday, February 2
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Guest: Roshan Mammen Abraham (UC Irvine)
Title: “Neutrino Physics and Dark Matter Searches at the Forward Physics Facility at the LHC”
Abstract: The recent observation of collider neutrinos by the FASER collaboration highlights the potential the forward direction at the LHC has for neutrino physics. In the HL-LHC era, we expect a significant number of neutrinos in the forward direction, opening the way for precision studies using collider neutrinos at the proposed Forward Physics Facility (FPF). In this talk, I will present some phenomenological studies in this direction. i) The electromagnetic properties of neutrinos (magnetic moments, milli-charge, charge radius) have attracted significant interest recently. We make use of the enhanced neutrino flux expected in the HL-LHC era along with the sophisticated detectors at the FPF to constrain these properties, as well as the weak mixing angle. ii) If a new sterile state exists that couple to SM neutrino via the photon through a dipole portal, then it will also leave a signature in these detectors via up-scattering. This allows us to constrain the magnetic dipole moment interaction between SM neutrinos and this new sterile state. Furthermore, these neutrino detectors can also be used to probe some light dark matter models. We present some results in this direction.
The BLAST Observatory: A Sensitivity Study for Far-IR Balloon-borne Polarimeters
Prototype Cherenkov Detector Characterization for Muon Tomography Applications
11:15 am, Friday, January 26
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Between the cosmic-ray `knee' and the `ankle': Contribution from star clusters
A detectable ultra-high-energy cosmic ray outburst from GRB 221009A
The Design and Construction of the Chips Water Cherenkov Neutrino Detector
11:15 am, Friday, January 19
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Photons from neutrinos: the gamma ray echo of a supernova neutrino burst
Alternative solvents for life: framework for evaluation, current status and future research
Fermi-LAT follow-up observations in seven years of realtime high-energy neutrino alerts
Testing Cosmic-Ray Propagation Scenarios with AMS-02 and Voyager Data
11:15 am, Friday, January 11
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SUB-GEV GAMMA RAYS FROM NEARBY SEYFERT GALAXIES AND IMPLICATIONS FOR CORONAL NEUTRINO EMISSION
Search for 10--1,000 GeV neutrinos from Gamma Ray Bursts with IceCube
Interacting supernovae as high-energy multimessenger transients
Photons from neutrinos: the gamma ray echo of a supernova neutrino burst
11:15 am, Friday, December 8th
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Guest: Dr. Austin Cummings (Penn State University)
Title: Secondary Lepton Production, Propagation, and Interactions with NuLeptonSim
Abstract: Charged current interactions of neutrinos inside the Earth can result in secondary muons and {\tau} - leptons which are detectable by a large swath of existing and planned neutrino experiments through a wide variety of event topologies. Consideration of such events can improve detector performance and provide unique signatures which help with event reconstruction. In this work, we describe NuLeptonSim, a propagation tool for neutrinos and charged leptons that builds on the fast NuTauSim framework. NuLeptonSim considers energy losses of charged leptons, modelled both continuously for performance or stochastically for accuracy, as well as interaction models for all flavors of neutrinos, including the Glashow resonance. We demonstrate the results from including these effects on the Earth emergence probability of various charged leptons from different flavors of primary neutrino and their corresponding energy distributions. We find that the emergence probability of muons can be higher than that of taus for energies below 100 PeV, whether from a primary muon or {\tau} neutrino, and that the Glashow resonance contributes to a surplus of emerging leptons near the resonant energy.
Secondary Lepton Production, Propagation, and Interactions with NuLeptonSim
Phenomenology of superheavy decaying dark matter from string theory
Could the TeV emission of starburst galaxies originate from pulsar wind nebulae?
Probing nuclear properties and neutrino physics with current and future CEνNS experiment
11:15 am, Friday, December 1st
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An extremely energetic cosmic ray observed by a surface detector array
New Signal of Atmospheric Tau Neutrino Appearance: Sub-GeV Neutral-Current Interactions in JUNO
On the transition radiation interpretation of anomalous ANITA events
11:15 am, Friday, November 17th
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Two Guests!
Guest: Dr. Bei Zhou (Fermilab)
Guest: Sayan Saha (graduate student at Indian Institute of Science Education and Research (IISER), Pune, India)
Title: Optimal Estimators for Cluster Masses using CMB Lensing
Paper: Cluster profiles from beyond-the-QE CMB lensing mass maps
Abstract: Being the largest collapsed structures in the universe, clusters of galaxies offer valuable insights into the nature of cosmic evolution. What we're really curious about is figuring out how many of these clusters exist at different masses and ages (redshifts). But here's the catch: measuring their mass isn't straightforward. So, we use a cosmic 'weighing scale' that uses faint deflections (weak gravitational lensing) of the oldest light in the universe—known as the cosmic microwave background (CMB) —to find out how massive these clusters really are. In this talk, I'll unveil the power of the Maximum-a-posteriori (MAP) method, showcasing its enhanced precision in measuring cluster masses compared to traditional quadratic estimators (QE). I also show how the MAP estimator is able to mitigate the well-known bias in temperature QE, due to the strong non-Gaussianity of the signal at cluster centre, without any scale cut.
Data downloaded via parachute from a NASA super-pressure balloon
New Signal of Atmospheric Tau Neutrino Appearance: Sub-GeV Neutral-Current Interactions in JUNO
Secondary Lepton Production, Propagation, and Interactions with NuLeptonSim
11:15 am, Friday, November 3rd
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The Compton-Pair telescope: A prototype for a next-generation MeV 𝜸-ray observatory
All-sky Medium Energy Gamma-ray Observatory: Exploring the Extreme Multimessenger Universe
Detectable MeV Neutrino Signals from Neutron-Star Common-Envelope Systems
Does or did the supernova remnant Cassiopeia A operate as a PeVatron?
Flavor Anisotropy in the High-Energy Astrophysical Neutrino Sky
11:15 am, Friday, October 27th
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Gamma-ray detection of newly discovered Ancora SNR: G288.8–6.3
Probing nuclear physics with supernova gravitational waves and machine learning
Two-detector flavor sensitivity to ultra-high-energy cosmic neutrinos
11:15 am, Friday, October 19th
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Guest: Dr. Andrea Albert (Los Alamos National Laboratory)
Title: Searching for Dark Matter with Wide-field TeV Observatories
Abstract: One of the main ways to probe the particle nature of dark matter is to look for particles from DM interactions in space. TeV cosmic gamma rays are a powerful probe and wide field of view observatories play a key role. The High Altitude Water Cherenkov (HAWC) has been surveying the TeV sky for over 8 years and the next generation Southern Wide-field Gamma-ray Observatory (SWGO) is currently being planned. I will show results from DM searches with HAWC and the expected sensitivity of SWGO.
Till the core collapses: the evolution and properties of self-interacting dark matter subhalos
Galactic Gamma-Ray Diffuse Emission at TeV energies with HAWC Data
Very high energy gamma-ray emission beyond 10 TeV from GRB 221009A
Simulating Geomagnetic Effects on Muons in Extensive Air Showers for the EUSO-SPB2 Mission
Cosmic-ray energy reconstruction using machine learning techniques
11:30 am, Friday, October 13th
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Guest: Prof. Rouzbeh Allahverdi (The University of New Mexico)
Title: Probing GeV-scale Dark Particles by Neutron Stars
Abstract: I start by introducing minimal extensions of the Standard Model that involve new particles with baryon-number-violating coupling to quarks. After a brief review of the existing experimental bounds on these models, I mention some ongoing work that uses neutron star binaries to tightly constrain GeV-scale fermions.
Discovery of a radiation component from the Vela pulsar reaching 20 teraelectronvolts
Universality of the Neutrino Collisional Flavor Instability in Core Collapse Supernovae
Tests and characterisation of the KI trigger for fast events on the EUSO-SPB2 Fluorescence Telescope
Prospects for a survey of the Galactic plane with the Cherenkov Telescope Array
11:15 am, Friday, October 6th
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POEMMA (Probe of Extreme Multi-Messenger Astrophysics) Roadmap Update
Review of Neutrino Experiments Searching for Astrophysical Neutrinos
Prospects for a survey of the Galactic plane with the Cherenkov Telescope Array
Impact of scalar NSI on the neutrino mass hierarchy sensitivity at DUNE, T2HK and T2HKK
11:30 am, Friday, September 22nd
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Detecting High-Energy Neutrinos from Galactic Supernovae with ATLAS
A Unified Picture of Short and Long Gamma-ray Bursts from Compact Binary Mergers
Modified temperature redshift relation and UHECR propagation
Energy-dependent flavour ratios in neutrino telescopes from charm
11:30 am, Friday, September 15th
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Constraining the Properties of Black Hole Seeds from the Farthest Quasars
Searches for neutrinos in the direction of radio-bright blazars with the ANTARES telescope
Search for Decaying Dark Matter in the Virgo Cluster of Galaxies with HAWC
11:30 am, Friday, September 8th
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Dark Matter Capture in Celestial Objects: Treatment Across Kinematic and Interaction Regimes
A Survey of Neutrino Flavor Models and the Neutrinoless Double Beta Decay Funnel
Flavor composition of neutrinos from choked gamma-ray bursts
Small-Scale Magnetic Fields are Critical to Shaping Solar Gamma-Ray Emission
Supernova Emission of Secretly Interacting Neutrino Fluid: Theoretical Foundations
Probing the Soft X-ray Properties and Multi-Wavelength Variability of SN2023ixf and its Progenitor
11:30 am, Friday, July 21st
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Guest: Shirley Weishi Li (UC Irvine)
Title: Old Data, New Forensics: The First Second of SN 1987A Neutrino Emission
Abstract: The next Milky Way supernova will be an epochal event in multi-messenger astronomy, critical to tests of supernovae, neutrinos, and new physics. Realizing this potential depends on having realistic simulations of core collapse. We investigate the neutrino predictions of nearly all modern models (1-, 2-, and 3-d) over the first ≃1 s, making the first detailed comparisons of these models to each other and to the SN 1987A neutrino data. Even with different methods and inputs, the models generally agree with each other. However, even considering the low neutrino counts, the models generally disagree with data. What can cause this? We show that neither neutrino oscillations nor diferent progenitor masses appear to be a sufficient solution. We outline urgently needed work.
Small-Scale Magnetic Fields are Critical to Shaping Solar Gamma-Ray Emission
Search for Extended Sources of Neutrino Emission in the Galactic Plane with IceCube
Shedding light on the Δm^2_{21} tension with supernova neutrinos
Neutrinos from GRB 221009A: producing ALPs and explaining LHAASO anomalous γ event
Searches for dark matter decay with ultra-high-energy neutrinos endure backgrounds
Probing Light Dark Matter through Cosmic-Ray Cooling in Active Galactic Nuclei
11:30 am, Friday, July 7th
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Guest: Federica Pompa (University of Valencia)
Title: Galactic cataclysm: Supernova neutronization burst to constraint neutrino mass
Abstract: Supernova (SN) explosions are the most powerful cosmic factories of all flavors, MeV-scale, neutrinos. Their detection is of great importance not only for astrophysics, but also to shed light on neutrino properties. Since the first observation of a SN neutrino signal in the 1987, the international network of SN neutrinos observatories has been greatly expanded, in order to detect the next galactic SN explosion with much higher statistics and accuracy in the neutrino energy-time-flavor space. In this contribution, I will discuss the constraints that we expect to achieve with next-generation neutrino experiments like DUNE and Hyper-Kamiokande, on the absolute value of the neutrino mass, obtained by considering the time delay in the propagation of massive neutrinos from production in the SN environment to their detection. Furthermore, the comparison of sensitivities achieved for the two possible neutrino mass orderings is discussed, as well as the effects due to propagation in the Earth matter.
Guest: Jorge Terol-Calvo (University of Valencia)
Title: Cosmology safe large neutrino masses
Abstract: Cosmological constraints on the sum of neutrino masses can be relaxed by considering a scenario where the number density of active neutrinos is reduced, while the effective number of neutrino species is maintained by introducing a new component of dark radiation. In this talk, I'll present a UV model based on a U(1) symmetry in the dark sector, which can be either gauged or global, to realize this intriguing concept. The model employs the seesaw mechanism to generate neutrino masses and introduces O(10) generations of massless sterile neutrinos that contribute to the dark radiation component. This framework allows for accommodating active neutrino masses in the range of electron volts (eV), which aligns with the sensitivity range of the KATRIN experiment. We further discuss the phenomenology of the model and identify the parameter space that satisfies the constraints imposed by current observations. Our study sheds light on the interplay between neutrino masses, dark radiation, and the underlying U(1) symmetry in the dark sector, providing insights into the fundamental properties of neutrinos and their cosmological implications.
11:30 am, Friday, June 30th
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Guest: Anna Suliga (UC Berkeley & UW-Madison)
Title: Distinctive nuclear signatures of low-energy atmospheric neutrinos
Abstract: New probes of neutrino mixing are needed to advance precision studies. One promising direction is via the detection of low-energy atmospheric neutrinos (below a few hundred MeV), to which a variety of near-term experiments will have much-improved sensitivity. Here we focus on probing these neutrinos through distinctive nuclear signatures of exclusive neutrino-carbon interactions -- those that lead to detectable nuclear-decay signals with low backgrounds -- in both neutral-current and charged-current channels. Here the neutral-current signature is a line at 15.11 MeV and the charged-current signatures are two- or three-fold coincidences with delayed decays. We calculate the prospects for identifying such events in the Jiangmen Underground Neutrino Observatory (JUNO), a large-scale liquid-scintillator detector. A five-year exposure would yield about 16 neutral-current events (all flavors) and about 16 charged-current events (mostly from νe+ν¯e, with some from νμ+ν¯μ), and thus roughly 25\% uncertainties on each of their rates. Our results show the potential of JUNO to make the first measurement of sub-100 MeV atmospheric neutrinos. They also a step towards multi-detector studies of low-energy atmospheric neutrinos, including with the goal of identifying additional distinctive nuclear signatures for carbon and other targets.
Guest: Victor Valera-Baca (NBI)
Title: Exploring neutrino--matter interactions at the EeV frontier
Abstract: Neutrino interactions with protons and neutrons probe their deep structure and may reveal new physics. The higher the neutrino energy, the sharper the probe. So far, the neutrino-nucleon (νN) cross section is known across neutrino energies from a few hundred MeV to a few PeV. Soon, ultra-high-energy (UHE) cosmic neutrinos, with energies above 100 PeV, could take us farther. So far, they have evaded discovery, but upcoming UHE neutrino telescopes endeavor to find them. I will present the first detailed measurement forecasts of the UHE νN cross section, geared to IceCube-Gen2, one of the leading detectors under planning. We use state-of-the-art ingredients in every stage of our forecasts: in the UHE neutrino flux predictions, the neutrino propagation inside Earth, the emission of neutrino-induced radio signals in the detector, their propagation and detection, and the treatment of backgrounds.
The NANOGrav 15 yr Data Set: Evidence for a Gravitational-wave Background
Observation of high-energy neutrinos from the Galactic plane
Atmospheric Lepton Fluxes via Two-Dimensional Matrix Cascade Equations
Electromagnetic Cascade Emission from Neutrino-Coincident Tidal Disruption Events
Neutrino decoherence and violation of the strong equivalence principle
Off-axis MeV and very-high-energy gamma-ray emissions from structured gamma-ray burst jets
Constraining MeV-scale axion-like particles with Fermi-LAT observations of SN 2023ixf
Setting an upper limit for the total TeV neutrino flux from the disk of our Galaxy
11:30 am, Friday, June 23rd
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JUNO sensitivity to the annihilation of MeV dark matter in the galactic halo
Anisotropic strong lensing as a probe of dark matter self-interactions
Evolution of Tau-Neutrino Lepton Number in Protoneutron Stars due to Active-Sterile Neutrino Mixing
11:30 am, Friday, June 16th
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White Dwarfs in Dwarf Spheroidal Galaxies: A New Class of Compact-Dark-Matter Detectors
Old Data, New Forensics: The First Second of SN 1987A Neutrino Emission
R-process beta-decay neutrino flux from binary neutron star merger and collapsar
A tera-electronvolt afterglow from a narrow jet in an extremely bright gamma-ray burst 221009A
11:30 am, Friday, June 9th
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Milky Way satellite velocities reveal the Dark Matter power spectrum at small scales
A Leptonic Model for Neutrino Emission From Active Galactic Nuclei
TeV halos and the role of pulsar wind nebulae as sources of cosmic ray positrons
An optimized search for dark matter in the galactic halo with HAWC
Confirmation of the spectral excess in DAMIC at SNOLAB with skipper CCDs
11:30 am, Friday, May 26th
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Guest: Toni Bertolez-Martinez (Barcelona U)
Title: IceCube and the origin of ANITA-IV events
Abstract: Recently, the ANITA collaboration announced the detection of new, unsettling Ultra-High-Energy (UHE) events. Understanding their origin is pressing to ensure success of the incoming UHE neutrino program. In this talk, I will discuss the ANITA-IV events in contrast with the lack of observations in the IceCube Neutrino Observatory. I will introduce a general framework to study the compatibility between these two observatories both in the SM and Beyond Standard Model (BSM) scenarios. Finally, I will discuss the constraints on BSM and highlight the importance of simultaneous observations by high-energy optical neutrino telescopes and new, UHE detectors to uncover cosmogenic neutrinos or discover new physics.
Guest: Stephan Meighen-Berger (U. Melbourne)
Title: Prometheus: An Open-Source Neutrino Telescope Simulation
Abstract: The construction of a worldwide network of gigaton-scale neutrino telescopes aims to address multiple open questions in physics, such as the origin of astrophysical neutrinos and the acceleration mechanism of high-energy cosmic rays. Besides astrophysics, neutrino telescopes probe center-of-mass energies similar to colliders, offering an additional window into high-energy particle interactions. Currently, there are no publicly available simulation tools for these detectors, leading to duplication in effort for each experiment and hindering the testing of theoretical models. While these detectors are built in ice or water at different locations, they operate on the same detection principle: Using multiple optical modules to detect Cherenkov photons emitted by charged particles. Using this, we developed Prometheus, an open-source simulation tool that offers a common simulation chain for all neutrino telescopes. It can inject neutrinos, propagate their interaction products, and model the amount of light reaching the optical modules of a user-defined detector in either ice or water. We will show its runtime performance, highlight successes in reproducing simulation results from multiple ice- and water-based observatories, and discuss simulation sets that we have made publicly available for various detectors.
Fast Neutrino Flavor Conversions can Help and Hinder Neutrino-Driven Explosions
Machine Learning for Quantum-Enhanced Gravitational-Wave Observatories
First measurement of η production in neutrino interactions on argon with MicroBooNE
Composite Dark Matter and Neutrino Masses from a Light Hidden Sector
11:30 am, Friday, May 19th
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Guest: Rasmi Hajjar (IFIC)
Title: Earth tomography with supernova neutrinos at future neutrino detectors
Abstract: Earth neutrino tomography is a realistic possibility with current and future neutrino detectors, complementary to geophysics methods. The two main approaches are based on either partial absorption of the neutrino flux as it propagates through the Earth (at energies about a few TeV) or on coherent Earth matter effects affecting the neutrino oscillations pattern (at energies below a few tens of GeV). In this talk I will focus on the latter approach focusing on supernova neutrinos with tens of MeV. Whereas at GeV energies, Earth matter effects are driven by the atmospheric mass-squared difference, at energies below ∼ 100 MeV, it is the solar mass-squared difference what controls them. Unlike solar neutrinos, which suffer from significant weakening of the contribution to the oscillatory effect from remote structures due to the neutrino energy reconstruction capabilities of detectors, supernova neutrinos can have higher energies and thus, can better probe the Earth’s interior. We revisit this possibility, using the most recent neutrino oscillation parameters and up-to-date supernova neutrino spectra. The capabilities of future neutrino detectors, such as DUNE, Hyper-Kamiokande and JUNO are presented, including the impact of the energy resolution and other factors. Assuming a supernova burst at 10 kpc, we show that the average Earth’s core density could be determined within ∼ 10% at 1σ confidence level, being Hyper-Kamiokande, with its largest mass, the most promising detector to achieve this goal.
Earth tomography with supernova neutrinos at future neutrino detectors
Identifying Extended PeVatron Sources via Neutrino Shower Detection
A Leptonic Model for Neutrino Emission From Active Galactic Nuclei
Exploring the spectrum of stochastic gravitational-wave anisotropies with pulsar timing arrays
TeV halos and the role of pulsar wind nebulae as sources of cosmic ray positrons
An optimized search for dark matter in the galactic halo with HAWC
11:30 am, Friday, May 5th
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The self-confinement of electrons and positrons from dark matter
Revisiting constraints on the photon rest mass with cosmological fast radio bursts
The rocket effect mechanism in neutron stars in supernova remnants
Precision CMB constraints on eV-scale bosons coupled to neutrinos
Constraining the dark matter interpretation of the positron excess with $γ$-ray data
11:30 am, Friday, April 28th
Guest: Anupam Ray (UC, Berkeley)
Title: Going Underground or Listening to the Sky?
Abstract: Dark Matter (DM) remains mysterious. Despite decades of experimental efforts, its microscopic identity is still unknown. Terrestrial detectors are placing stringent exclusions on various parts of the DM parameter space, however, there exist a few blind-spots. In this talk, I will demonstrate how existing GW detectors can be used to unravel the particle nature of DM. More specifically, by observing low mass black hole mergers, existing GW detectors can provide unprecedented sensitivity to the weakly-interacting heavy dark matter, a blind spot to the terrestrial DM detectors. I will also walk you through how continued existence of a variety of stellar objects can probe strongly-interacting heavy DM, a yet another blind spot.
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Repeated patterns of gamma-ray flares reveal structured jets of blazars as likely neutrino sources
Terzina on board NUSES: a pathfinder for EAS Cherenkov Light Detection from space
Improving the Composition of Ultra High Energy Cosmic Rays with Ground Detector Data
Cosmic ray transport in large-amplitude turbulence with small-scale field reversals
The Magnetohydrodynamic-Particle-In-Cell Module in Athena++: Implementation and Code Tests
Effects of large-scale magnetic fields on the observed composition of ultra high-energy cosmic rays
A Cross-correlation Study between IceCube Neutrino Events and the Fermi Unresolved Gamma-ray Sky
Detectability of Late-time Supernova Neutrinos with Fallback Accretion onto Protoneutron star
Searching for Heavy Dark Matter near the Planck Mass with XENON1T
High-Frequency Gravitational Wave Detection via Optical Frequency Modulation
11:30 am, Friday, April 21st
Prospects for ultra-high-energy particle acceleration at relativistic shocks
Measuring the Cosmic X-ray Background in 3-20keV with Straylight from NuSTAR
Accurate Inverse-Compton Models Strongly Enhance Leptophilic Dark Matter Signals
Probing neutrino production in high-energy astrophysical neutrino sources with the Glashow Resonance
Muons in EASs with E0=1019 eV according to data of the Yakutsk Array
No evidence for p- or d-wave dark matter annihilation from local large-scale structure
11:30 am, Friday, April 14th
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There and back again: Solar cycle effects in future measurements of low-energy atmospheric neutrinos
Probing neutrino production in high-energy astrophysical neutrino sources with the Glashow Resonance
Impact of dark matter spikes on the merger rates of Primordial Black Holes
The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters
Detecting Stochastic Wave Dark Matter with Fermi-LAT γ-ray Pulsar Timing Array
GRB 211211A-like Events and How Gravitational Waves May Tell Their Origin
JUNO as a Probe of the Pseudo-Dirac Nature using Solar Neutrinos
11:30 am, Friday, April 7th
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Searching for dark matter subhalos in the Fermi-LAT catalog with Bayesian neural networks
Spontaneous Human Combustion rules out all standard candidates for Dark Matter
Sensitivity to Supernovae Average $ν_x$ Temperature with Neutral Current Interactions in DUNE
Searching for dark matter subhalos in the Fermi-LAT catalog with Bayesian neural networks
A novel prediction for secondary positrons and electrons in the Galaxy
Detection of extended gamma-ray emission around the Geminga pulsar with H.E.S.S
Anomalous Tau Neutrino Appearance from Light Mediators in Short-Baseline Neutrino Experiments
11:30 am, Friday, Mar 31st
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Measuring the speed of light with updated Hubble diagram of high-redshift standard candles
Constraints on the baryonic load of gamma-ray bursts using ultra-high energy cosmic rays
Modulation of cosmic ray anti-protons in the heliosphere: simulations for a solar cycle
Extreme ion acceleration at extragalactic jet termination shocks
Data driven analysis of cosmic rays in the heliosphere: diffusion of cosmic protons
The Greisen Function and its Ability to Describe Air-Shower Profile
Flavor conversions with energy-dependent neutrino emission and absorption
The jet apparent motion and central engine study of Fermi blazars
He abundance of Dense Circumstellar Clumps in the Cassiopeia A Supernova Remnant
Ultra-peripheral collisions of charged hadrons in extensive air showers
First Dark Matter Search with Nuclear Recoils from the XENONnT Experiment
11:30 am, Friday, Mar 24th
Guest: Hidetoshi Omiya (Kyoto University)
Abstract: Ultra-light particles, such as axions, form a macroscopic condensate around a highly spinning black hole by the superradiant instability. Due to its macroscopic nature, the condensate opens the possibility of detecting the axion through gravitational wave observations. However, the precise evolution of the condensate must be known for the actual detection. For future observation, we numerically study the influence of the self-interaction, especially interaction between different modes, on the evolution of the condensate in detail. First, we focus on the case when condensate starts with the smallest possible angular quantum number. For this case, we perform the non-linear calculation and show that the dissipation induced by the mode interaction is strong enough to saturate the superradiant instability, even if the secondary cloud starts with quantum fluctuations. Our result indicates that explosive phenomena such as bosenova do not occur in this case. We also show that the condensate settles to a quasi-stationary state mainly composed of two modes, one with the smallest angular quantum number for which the superradiant instability occurs and the other with the adjacent higher angular quantum number. We also study the case when the condensate starts with the dominance of the higher angular quantum number. We show that the dissipation process induced by the mode coupling does not occur for small gravitational coupling. Therefore, bosenova might occur in this case.
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Hunting for Neutral Leptons with Ultra-High-Energy Cosmic Ray
Limits on Neutrino Emission from GRB 221009A from MeV to PeV using the IceCube Neutrino Observatory
Observation of Seasonal Variations of the Flux of High-Energy Atmospheric Neutrinos with IceCube
Earth tomography with supernova neutrinos at future neutrino detectors
Prospects for joint cosmic ray and neutrino constraints on the evolution of trans-GZK proton sources
11:30 am, Friday, Mar 10th
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Where are the Cascades from Blazar Jets? An Emerging Tension in the γ-ray sky
Constraining High-Energy Neutrino Emission from Supernovae with IceCube
TASI Lectures on the Particle Physics and Astrophysics of Dark Matter
Dark Matter Annihilation Inside Large Volume Neutrino Detectors
The Neutrino Magnetic Moment Portal and Supernovae: New Constraints and Multimessenger Opportunities
Observation of Seasonal Variations of the Flux of High-Energy Atmospheric Neutrinos with IceCube
Prospects for joint cosmic ray and neutrino constraints on the evolution of trans-GZK proton sources
11:30 am, Friday, Mar 3rd
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The Neutrino Magnetic Moment Portal and Supernovae: New Constraints and Multimessenger Opportunities
Constraints on the Cosmological Coupling of Black Holes from the Globular Cluster NGC 3201
Quantifying the tension between cosmological and terrestrial constraints on neutrino masse
The origin of power-law spectra in relativistic magnetic reconnection
11:30 am, Friday, Feb 24th
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The Neutrino Magnetic Moment Portal and Supernovae: New Constraints and Multimessenger Opportunities
A Search for Low-mass Dark Matter via Bremsstrahlung Radiation and the Migdal Effect in SuperCDMS
Interpretation of the observed neutrino emission from three Tidal Disruption Events
Measurement of 19F(p,γ)20Ne reaction suggests CNO break-out in first stars
Axion Star Explosions: A New Source for Axion Indirect Detection
How to measure the reactor neutrino flux below the inverse beta decay threshold with CEνNS
Primordial Gravitational Waves From Black Hole Evaporation in Standard and Non-Standard Cosmologies
Implication of GRB 221009A: Can TeV Emission Come from the GRB Prompt Phase?
11:30 am, Friday, Feb 17th
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Solar-cycle and Latitude Variations in the Internetwork Magnetism
The Gravitational-Wave Signature of Core-Collapse Supernovae
Limits on Neutrino Emission from GRB 221009A from MeV to PeV using the IceCube Neutrino Observatory
Searching for TeV Dark Matter in Irregular dwarf galaxies with HAWC Observatory
11:30 am, Friday, Feb 10th
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Can Neutrino Self-interactions Save Sterile Neutrino Dark Matter?
Revisiting ultrahigh-energy constraints on decaying super-heavy dark matter
GRB 221009A: Discovery of an Exceptionally Rare Nearby and Energetic Gamma-Ray Burst
Cosmological gravitational particle production of massive spin-2 particles
Lack of Bright Supernova Emission in the Brightest Gamma-ray Burst, GRB~221009A
Reinterpretation of searches for long-lived particles from meson decays
11:30 am, Friday, Feb 3rd
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Detection of Ultra High Energy Cosmic Rays and Neutrinos with Lunar Orbital Radio Telescope
Constraining Co-Varying Coupling Constants from Globular Cluster Age
11:30 am, Friday, Jan 27th
Guest: Christopher Cappiello (Queen's U)
Title: An Analytic Approach to Light Dark Matter Propagation
Abstract: If dark matter interacts too strongly with nuclei, it could be slowed to undetectable speeds in Earth's crust or atmosphere before ever reaching a detector. For sub-GeV dark matter, analytic approximations appropriate for heavier dark matter fail, necessitating the use of computationally expensive simulations. We present a new method of modeling attenuation of light dark matter in the Earth, based on the approximation that the scattering is isotropic in the lab frame. We show that this approach agrees well with Monte Carlo results, and can be much faster when the number of scatterings becomes large, as the runtime for Monte Carlo methods increases exponentially with cross section. We use this method to model attenuation for sub-dominant dark matter--that is, particles that make up a small fraction of the dark matter density--and show that previous work on sub-dominant dark matter overestimates the sensitivity of direct detection experiments.
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On the Injection Scale of the Turbulence in the Partially Ionized Very Local Interstellar Medium
The formation of hard VHE spectra from GRB afterglow via Two-Zone Synchrotron Self-Compton Emission
Search of the pair echo signatures in the high-energy light curve of GRB190114C
Localisation of gamma-ray bursts from the combined SpIRIT+HERMES-TP/SP nano-satellite constellation
Galactic Population Synthesis of Radioactive Nucleosynthesis Ejecta
Retuning the radio astronomical search for axion dark matter with neutron stars
Radiative Acceleration of Dense Circumstellar Material in Interacting Supernovae
Understanding the TeV γ-ray emission surrounding the young massive star cluster Westerlund 1
Hadronic versus leptonic origin of gamma-ray emission from supernova remnants
Probing gamma-ray bursts observed at very high energies through their afterglow
Dark Photon Bremsstrahlung and Ultra-High-Energy Cosmic Rays
Detection of the Crab Nebula using a Random Forest Analysis of the first TAIGA IACT Data
Can Neutrino Self-interactions Save Sterile Neutrino Dark Matter?
Search for inelastic dark matter-nucleus scattering with the PICO-60 CF3I and C3F8 bubble chambers
11:30 am, Friday, Jan 20th
Use this link to access the meeting: Cancelled, take a break.
Supernova model discrimination with a kilotonne-scale Gd-H2O Cherenkov detector
Multi-class classification of Fermi-LAT sources with hierarchical class definition
The Use of the Signal at an Optimal Distance from the Shower Core as a Surrogate for Shower Size
Mineral Detection of Neutrinos and Dark Matter. A Whitepaper
Effective Shielding of ≲ 10 GeV Cosmic Rays from Dense Molecular Clumps
Dissecting the broadband emission from γ-ray blazar PKS 0735+178 in search of neutrinos
Evolution and feedback of AGN Jets of different Cosmic-ray Composition
Many-body neutrino flavor entanglement in a simple dynamic model
11:30 am, Friday, Jan 13th
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Hint for a TeV neutrino emission from the Galactic Ridge with ANTARES
Constraints on heavy decaying dark matter from 570 days of LHAASO observations
Bump-hunting in the diffuse flux of high-energy cosmic neutrinos
HAWC Detection of a TeV Halo Candidate Surrounding a Radio-quiet pulsar
Can Sterile Neutrino Explain Very High Energy Photons from GRB221009A?
Thermal Control System to Easily Cool the GAPS Balloon-borne Instrument on the Ground
Gamma-ray emission from spectrally resolved cosmic rays in galaxies
New Particle Identification Approach with Convolutional Neural Networks in GAPS
Celestial Objects as Strongly-Interacting Asymmetric Dark Matter Detectors
How, where and when do cosmic rays reach ultrahigh energies?
Probing LHAASO Galactic PeVatrons through gamma-ray and neutrino correspondence
Searching for Ultralight Dark Matter Conversion in Solar Corona using LOFAR Data
High-energy neutrinos and gamma rays from winds and tori in active galactic nuclei
Updating the 56Ni Problem in Core-collapse Supernova Explosion
On the gamma-ray emission from the core of the Sagittarius dwarf galaxy
The impact of dark matter-baryon relative velocity on the 21cm forest
A Gap No More: Mechanism for Non-Nuclear Energy to Fill in the Black Hole Mass Gap
MeV to multi-TeV thermal WIMPs are all observationally allowed
11:45 am, Friday, Dec 16th
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The TeV Sun Rises: Discovery of Gamma rays from the Quiescent Sun with HAWC
A New Component from the Quiet Sun: Synchrotron Radiation from Galactic Cosmic-Ray Electrons
The Cosmic Neutrino Background Distribution on the Surface of the Earth
Evaporation of Primordial Black Holes in the Early Universe: Mass and Spin Distributions
Actinide-boosting r Process in Black Hole-Neutron Star Merger Ejecta
Parameter Estimation for Stellar-Origin Black Hole Mergers In LISA
Indirect Evidence for Dark Matter Density Spikes around Stellar-Mass Black Holes
Discovery and properties of the earliest galaxies with confirmed distances
Search for sub-TeV Neutrino Emission from Novae with IceCube-DeepCore
11:45 am, Friday, Dec 9th
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Guest: Alejandro Ramirez
Title: Applying Noble Liquid Particle Detection in Nuclear Imaging: Positron Emission Tomography
Abstract: In the field of astroparticle physics, noble liquids such as Argon and Xenon are widely used in underground particle detectors searching for candidate dark matter particles. They offer a variety of advantages over solid, room temperature scintillators and therefore these liquid scintillators can be utilized in other fields of research such as medical imaging.
Positron Emission Tomography (PET) is used to observe metabolic processes within patients. It works by reconstructing the annihilation origin of incident gamma rays produced by a positron emitting tracer. However, inefficiencies of current PET technology, such photomultiplier tubes, can result in poor imaging. We propose 3Dπ: a full body, Time of Flight (TOF) PET scanner using Silicon Photomultipliers (SiPM) coupled with a xenon-doped Liquid Argon (Lar+Xe) scintillator. We simulated this design using Geant4 while following the National Electrical Manufacturers Association's evaluation tests for performance assessment. We will present results that highlight a 200-fold increase in sensitivity, spatial resolutions comparable to commercial PET scanners and produce PET images from 15-30 second scans faster than traditional 30-35-minute scans. Further studies will involve optimizing the layer thickness of Lar+Xe. With this scintillator and SiPMs, we can use the precise TOF info of gamma rays to improve the localization of individual positron annihilations and provide low-dose PET scans for patients who may be at high risk for exposure to radiation.
XMM-Newton and Chandra observations of the candidate Fermi-LAT pulsar 4FGL J1015.5-6030
Invisible Neutrino Decays as Origin of TeV Gamma Rays from GRB221009A
Electron polarization in ultrarelativistic plasma current filamentation instabilities
Stringent Pulsar Timing Bounds on Light Scalar Couplings to Matter
Revisiting Tests of Lorentz Invariance with Gamma-ray Bursts: Effects of Intrinsic Lags
Particle acceleration at ultrarelativistic, perpendicular shock fronts
Progress in Nuclear Astrophysics: a multi-disciplinary field with still many open questions
A New Component from the Quiet Sun: Synchrotron Radiation from Galactic Cosmic-Ray Electrons
The design and performance of the XL-Calibur anticoincidence shield
A Novel JupyterLab User Experience for Interactive Data Visualization
An Unsupervised Machine Learning Method for Electron--Proton Discrimination of the DAMPE Experiment
A Standardized Framework for Collecting Graduate Student Input in Faculty Searches
11:45 am, Friday, Dec 2nd
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Diffuse neutrino flux measurements with the Baikal-GVD neutrino telescope
Constraints on pseudo-Dirac neutrinos using high-energy neutrinos from NGC 1068
Probing Pseudo-Dirac Neutrinos with Astrophysical Sources at IceCube
Towards detecting super-GeV dark matter via annihilation to neutrinos
Anisotropic Photon and Electron Scattering without Ultrarelativistic Approximation
A very luminous jet from the disruption of a star by a massive black hole
Dark Matter Pollution in the Diffuse Supernova Neutrino Background
High-energy Neutrino Productions from AGN Disk Transients Impacted by Circum-disk Medium
Multiplicity of TeV muons in air showers detected with IceTop and IceCube
Growing evidence for high-energy neutrinos originating in radio blazars
Proto-neutron stars as cosmic factories for massive axion-like-particles
Diffuse Emission of Galactic High-Energy Neutrinos from a Global Fit of Cosmic Rays
Identifying the physical origin of gamma-ray bursts with supervised machine learning
Neutrino Non-standard Interactions with arbitrary couplings to u and d quarks
11:45 am, Friday, Nov 18th
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Guest: Pawan Dhakal
Title: New Constraints on Macroscopic Dark Matter Using Radar Meteor Detectors
Abstract: We show that dark-matter candidates with large masses and large nuclear interaction cross sections are detectable with terrestrial radar systems. We develop our results in close comparison to successful radar searches for tiny meteoroids, aggregates of ordinary matter. The path of a meteoroid (or suitable dark-matter particle) through the atmosphere produces ionization deposits that reflect incident radio waves. We calculate the equivalent radar echoing area or `radar cross section' for dark matter. By comparing the expected number of dark-matter-induced echoes with observations, we set new limits in the plane of dark-matter mass and cross section, complementary to pre-existing cosmological limits. Our results are valuable because (A) they open a new detection technique for which the reach can be greatly improved and (B) in case of a detection, the radar technique provides differential sensitivity to the mass and cross section, unlike cosmological probes.
White Dwarfs in Dwarf Spheroidal Galaxies: A New Class of Compact-Dark-Matter Detectors
Entanglement in three-flavor collective neutrino oscillations
γ-ray and ultra-high energy neutrino background suppression due to solar radiation
Black Holes as "Time Capsules": A Cosmological Graviton Background and the Hubble Tension
Field line subdiffusion and cosmic ray perpendicular transport in isotropic turbulence
Diffusion of relativistic charged particles and field lines in isotropic turbulence
A Simple Sub-Grid Model For Cosmic Ray Effects on Galactic Scales
Indirect Detection of Dark Matter Annihilating into Dark Glueballs
On the Hadronic Origin of High Energy Emission of γ-ray Loud Narrow-Line Seyfert 1 PKS 1502+036
First observation of the cosmic ray shadow of the Moon and the Sun with KM3NeT/ORCA
Interaction between massive star winds and the interstellar medium
Limits on Leptonic TeV Emission from the Cygnus Cocoon with Swift-XRT
Diffuse neutrino flux measurements with the Baikal-GVD neutrino telescope
Discovery of GeV gamma-ray emission from PWN Kes 75 and PSR J1846-0258
Charging of free-falling test masses in orbit due to cosmic rays: results from LISA Pathfinder
Adaptive surface code for quantum error correction in the presence of temporary or permanent defects
Influence of extragalactic magnetic fields on extragalactic cascade gamma-ray emission
Constraints on Dark Matter-Electron Scattering from Molecular Cloud Ionization
Ultra high energy cosmic rays from past activity of Andromeda galaxy
The Impact of Cosmic Ray Injection on Magnetic Flux Tubes in a Galactic Disk
The cosmic ray ionisation and γ-ray budgets of star-forming galaxies
11:45 am, Friday, Nov 4th
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Guest: Joaquim Iguaz (LAPTh, CNRS)
Title: Are PBHs everything everywhere all at once? Astrophysical and cosmological signatures of PBHs
Abstract: In recent years, Primordial Black Holes (PBHs) have been presented as extremely versatile objects providing a unique probe of the early Universe, gravitational phenomena, high energy physics and quantum gravity. Of particular interest is the role of PBHs as a non-particle candidate for the dark matter (DM). Although most of the PBH DM parameter space is tightly constrained, the asteroid mass range is still potentially viable. The lower end is accessible via high-energy astrophysical probes, sensitive to their Hawking evaporation spectrum. In the first part of the talk, I will revisit the constraints on evaporating PBHs from both the isotropic X-ray and soft γ-ray background, and the diffuse soft γ-ray emission towards the inner Galaxy as measured by INTEGRAL, setting the strongest limit on PBH DM for masses up to 4×10^17 g. The interest for PBHs has also been revamped in the light of recent LIGO/Virgo measurements of coalescing black hole binaries with typical masses of tens of M⊙. The best-motivated scenario for a sizable PBH contribution to such events invokes the QCD phase transition, which naturally enhances the probability to form PBH with masses of stellar scale. In the second part of the talk, I will reconsider the expected mass function associated not only to the QCD phase transition proper, but also the following particle antiparticle annihilation processes, and analyse the constraints on this scenario from a number of observations. We find that the scenario is not viable, unless ad hoc features in the power-spectrum are introduced by hand. Despite these negative results, we note that a future detection of coalescing binaries involving sub-solar PBHs has the potential to check the cosmological origin of SMBHs at the e± annihilation epoch, if indeed the PBH mass function is shaped by the changes to the equation of state driven by the thermal history of the universe.
Guest: Christopher Cappiello (Queen's U)
[https://arxiv.org/abs/2210.09448]
Title: Dark Matter from Monogem
Abstract: As a supernova shock expands into space, it may collide with dark matter particles, scattering them up to velocities more than an order of magnitude larger than typical dark matter velocities in the Milky Way. If a supernova remnant is close enough to Earth, and the appropriate age, this flux of high-velocity dark matter could be detectable in direct detection experiments, particularly if the dark matter interacts via a velocity-dependent operator. This could make it easier to detect light dark matter that would otherwise have too little energy to be detected. We show that the Monogem Ring supernova remnant is both close enough and the correct age to produce such a flux, and thus we produce novel direct detection constraints and sensitivities for future experiments.
Evidence for neutrino emission from the nearby active galaxy NGC 1068
White Dwarfs in Dwarf Spheroidal Galaxies: A New Class of Compact-Dark-Matter Detectors
GRB 221009A: A light dark matter burst or an extremely bright Inverse Compton component?
Dark matter freeze-in produces large post-inflationary isocurvature
Testing Primordial Black Hole Dark Matter with ALMA Observations of the Gravitational Lens B1422+231
GRB221009A Gamma Rays from Radiative Decay of Heavy Neutrinos?
PAST EVENTS
11:45 am, Friday, Oct 28th
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New Constraints on Dark Matter and Cosmic Neutrino Profiles through Gravity
Implications of the non-observation of 6Li in halo stars for the primordial 7Li problem
If dark matter is fuzzy, the first stars form in massive pancakes
Uncovering the neutrino mass ordering with the next galactic core-collapse supernova neutrino burst
Searches for Ultra-High-Energy Photons at the Pierre Auger Observatory
Search for spatial coincidence between IceCube neutrinos and radio pulsars
Clusteringenesis: from Light to Heavy Primordial Black Holes
Towards a reliable calculation of relic radiation from primordial gravitational waves
Super-resolution simulation of the Fuzzy Dark Matter cosmological model
The Role of a Heavy Neutrino in the Gamma-Ray Burst GRB-221009A
Model constraints based on the IceCube neutrino non-detection of GRB 221009A
On the Merger Rate of Primordial Black Holes in Cosmic Voids
Converting dark matter to dark radiation does not solve cosmological tensions
11:45 am, Friday, Oct 21st
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High-energy neutrinos from choked-jet supernovae: searches and implications
Axion dark matter from first-order phase transition, and very high energy photons from GRB 221009A
New Constraints on Dark Matter and Cosmic Neutrino Profiles through Gravity
Strong lensing constraints on primordial black holes as a dark matter candidate
Dark Matter prospects with COSI: ALPs, PBHs and sub-GeV Dark Matter
Parameters of axion-like particles required to explain high-energy photons from GRB 221009A
High-energy neutrino emission from magnetised jets of rapidly rotating protomagnetars
Gravitational focusing effects on streaming dark matter as a new detection concept
Evidence of a signature of planet formation processes from solar neutrino fluxes
The PI Launchpad: Expanding the base of potential Principal Investigators across space sciences
11:45 am, Friday, Oct 6th
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Guest: Gonzalo Herrera (TUM)
Title: Neutrino and gamma-ray attenuation by dark matter spikes
[https://arxiv.org/abs/2209.06339]
Abstract:
In this talk, I will discuss the attenuation of high energy neutrinos and photons produced in a blazar when they propagate through the dark matter spike around the central black hole and the halo of the host galaxy. In particular, I will discuss new constraints on the dark matter-neutrino and dark matter-photon scattering cross sections obtained from the observation by IceCube of a few high-energy neutrino events from TXS 0506+056, and their coincident gamma-ray events. I will emphasize the dependence of the constraints with the location where the neutrinos and gamma-rays are produced, and the dependence with the dark matter self-annihilation cross section. The constraints are orders of magnitude more stringent than those derived from considering the attenuation through the intergalactic medium and the Milky Way dark matter halo. When the cross-section increases with energy, the constraints are also stronger than those derived from the CMB and large-scale structure.
Guest: Rostom Mbarek (U Chicago)
Title: High-Energy Neutrino Emission from Espresso-Accelerated Ions in Jets of Active Galactic Nuclei
[https://arxiv.org/abs/2207.07130]
Abstract:
We present a bottom-up calculation of the flux of ultra-high energy cosmic rays (UHECRs) and high-energy neutrinos produced by powerful jets of active galactic nuclei (AGNs). By propagating test particles in 3D relativistic magnetohydrodynamic jet simulations, including a Monte Carlo treatment of sub-grid pitch-angle scattering and attenuation losses due to realistic photon fields, we study the spectrum and composition of the accelerated UHECRs and estimate the amount of neutrinos produced in such sources. We find that UHECRs may not be significantly affected by photodisintegration in AGN jets where the espresso mechanism efficiently accelerates particles, consistent with Auger's results that favor a heavy composition at the highest energies. Moreover, we present estimates and upper bounds for the flux of high-energy neutrinos expected from AGN jets. In particular, we find that: i) source neutrinos may account for a sizable fraction, or even dominate, the expected flux of cosmogenic neutrinos; ii) neutrinos from the \beta-decay of secondary neutrons produced in nucleus photodisintegration could in principle contribute to the PeV neutrino flux observed by IceCube, but can hardly account for all of it; iii) UHECRs accelerated via the espresso mechanism lead to nearly isotropic neutrino emission, which suggests that nearby radio galaxies may be more promising as potential sources. We discuss our results in the light of multimessenger astronomy and current/future neutrino experiments.
High-energy neutrinos from choked-jet supernovae: searches and implications
Explosive nucleosynthesis with fast neutrino-flavor conversion in core-collapse supernovae
High Altitude characterization of the Hunga Pressure Wave with Cosmic Rays by the HAWC Observatory
Neutrino propagation in the Earth and emerging charged leptons with 𝚗𝚞𝙿𝚢𝙿𝚛𝚘𝚙
Multi-wavelength study of the galactic PeVatron candidate LHAASO J2108+5157
Neutrino Cadence of TXS~0506+056 Consistent with Supermassive Binary Origin
Astroparticle and particle physics at ultra-high energy: results from the Pierre Auger Observatory
11:45 am, Friday, Sept 23rd
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New Constraints on Macroscopic Dark Matter Using Radar Meteor Detectors
Improved Constraints on Dark Matter Annihilations Around Primordial Black Holes
Resonant Production of Light Sterile Neutrinos in Compact Binary Merger Remnants
Searching for axion dark matter with MeerKAT Radio Telescope
Novel Constraints on Axions Produced in Pulsar Polar Cap Cascades
A Double Layered Water Cherenkov Detector Array for Gamma-Ray Astronomy
Can the Production Cross-Section Uncertainties Explain the Cosmic Fluorine Anomaly?
Neutron Tagging following Atmospheric Neutrino Events in a Water Cherenkov Detector
Structure in the Magnetic Field of the Milky Way Disk and Halo traced by Faraday Rotation
Using TeV Cosmic Rays to probe the Heliosphere's Boundary with the Local Interstellar Medium
Limits on the Diffuse Gamma-Ray Background above 10 TeV with HAWC
11:45 am, Friday, Sept 16th
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Exploiting stellar explosion induced by the QCD phase transition in large-scale neutrino detectors
Near-Earth Supernovae in the Past 10 Myr: Implications for the Heliosphere
Astrophysical Observations of a Dark Matter-Baryon Fifth Force
Search for photons above 10^19 eV with the surface detector of the Pierre Auger Observatory
Probing Quantum Gravity with Elastic Interactions of Ultra-High-Energy Neutrinos
Snowmass 2021 topical group report: Neutrinos from Natural Sources
11:45 am, Friday, Sept 9nd
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IceCube search for neutrinos coincident with gravitational wave events from LIGO/Virgo run O3
Search for Astrophysical Neutrinos from 1FLE Blazars with IceCube
Dark matter substructures affect dark matter-electron scattering in direct detection experiments
The impact of primordial black holes on the 21-cm angular-power spectrum in the dark ages
Probing hadronic interaction models with the hybrid data of the Pierre Auger Observatory
Pulsars as candidates of LHAASO sources J2226+6057, J1908+0621 and J1825-1326
Compact Binary Foreground Subtraction in Next-Generation Ground-Based Observatories
Light Curves and Event Rates of Axion Instability Supernovae
Can the Production Cross-Section Uncertainties Explain the Cosmic Fluorine Anomaly?
A PeVatron Candidate: Modelling the Boomerang Nebula in X-ray Band
No room to hide: implications of cosmic-ray upscattering for GeV-scale dark matter
11:45 am, Friday, Sept 2nd
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Galactic contribution to the high-energy neutrino flux found in track-like IceCube events
Opportunistic search for continuous gravitational waves from compact objects in long-period binaries
Interchange reconnection within coronal holes powers the fast solar wind
The supernova remnant SN 1006 as a Galactic particle accelerator
Exploiting stellar explosion induced by the QCD phase transition in large-scale neutrino detectors
The all-particle energy spectrum of cosmic rays from 10 TeV to 1 PeV measured with HAWC
A measurement of the proton plus helium spectrum of cosmic rays in the TeV region with HAWC
Detection of GeV emission from an ultra-long gamma-ray burst with the Fermi Large Area Telescope
11:45 am, Friday, Aug 19th
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Galactic contribution to the high-energy neutrino flux found in track-like IceCube events
A first search of transients in the Galactic Center from 230 GHz ALMA observations
Identifying diffuse spatial structures in high-energy photon lists
A Probabilistic Model for the Efficiency of Cosmic-Ray Radio Arrays
Possible counterpart signal of the Fermi bubbles at the cosmic-ray positrons
Into the darkness: Ultra-high energy neutrinos from high-redshift electromagnetic cascades
Evidence for PeV Proton Acceleration from Fermi-LAT Observations of SNR G106.3+2.7
Development of the photo-diode subsystem for the HERD calorimeter double-readout
Cosmic-ray ionization rate in protoplanetary disks with sheared magnetic fields
Check on the features of potted 20-inch PMTs with 1F3 electronics prototype at Pan-Asia
The hunt for extraterrestrial high-energy neutrino counterparts
11:45 am, Friday, Aug 5th
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Dynamical perturbations around an extreme mass ratio inspiral near resonance
Transport parameters from AMS-02 F/Si data and fluorine source abundance
Gravitational-wave event rates as a new probe for dark matter microphysics
Shining Light on Cosmogenic Axions with Neutrino Experiments
11:45 am, Friday, July 29th
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High-energy neutrino transients and the future of multi-messenger astronomy
Search for New Physics in Electronic Recoil Data from XENONnT
Iterative-Bayesian unfolding of isotopic cosmic-ray fluxes measured by AMS-02
Large-scale anisotropies of extragalactic cosmic rays below the ankle
Escape of cosmic rays from perpendicular shocks in the circumstellar magnetic field
Firefly: a browser-based interactive 3D data visualization tool for millions of data points
11:45 am, Friday, July 22nd
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Long-Exposure NuSTAR Constraints on Decaying Dark Matter in the Galactic Halo
A New Probe of Relic Neutrino Clustering using Cosmogenic Neutrinos
Constraints on primordial black holes from observation of stars in dwarf galaxies
High-Energy Neutrino Emission from Espresso-Reaccelerated Ions in Jets of Active Galactic Nuclei
Neutrino Flavor Conversion, Advection, and Collisions: The Full Solution
Revisiting constraints on WIMPs around primordial black holes
Dark Matter Constraints from the Eccentric Supermassive Black Hole Binary OJ 287
Observational constraints on cosmic-ray escape from UHE accelerators
The MIGDAL experiment: Measuring a rare atomic process to aid the search for dark matter
Higgsino Dark Matter Confronts 14 years of Fermi Gamma Ray Data
Cosmological prior for the J-factor estimation of dwarf spheroidal galaxies
Search for dark matter annihilation signals in the H.E.S.S. Inner Galaxy Survey
11:45 am, Friday, July 15th (Pure virtual)
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Galactic Cosmic-Ray Propagation in the Inner Heliosphere: Improved Force-Field Model
Long-Exposure NuSTAR Constraints on Decaying Dark Matter in the Galactic Halo
First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
Global view of neutrino interactions in cosmology: The freestreaming window as seen by Planck
Solar ν¯e flux: Revisiting bounds on neutrino magnetic moments and solar magnetic field
New constraint on neutrino magnetic moment from LZ dark matter search results
Long-Exposure NuSTAR Constraints on Decaying Dark Matter in the Galactic Halo
Search for Astrophysical Neutrinos from 1FLE Blazars with IceCube
Model marginalized constraints on neutrino properties from cosmology
Closing the window on fuzzy dark matter with the 21cm signal
Beginning a journey across the universe: the discovery of extragalactic neutrino factories
Direct detection of dark photon dark matter using radio telescopes
Searches for massive neutrinos with mechanical quantum sensors
11:45 am, Friday, July 8th (Pure virtual)
Guest: Marc Oncins (ICC-UB)
Title: Primordial black holes capture by stars and induced collapse to low-mass stellar black holes
[https://arxiv.org/abs/2205.13003]
Abstract:
Primordial black holes in the asteroid-mass window (∼10^(−16) to 10^(−11) M⊙), which might constitute all the dark matter, can be captured by stars when they traverse them at low enough velocity. After being placed on a bound orbit during star formation, they can repeatedly cross the star if the orbit happens to be highly eccentric, slow down by dynamical friction and end up in the stellar core. The rate of these captures is highest in halos of high dark matter density and low velocity dispersion, when the first stars form at redshift z∼20. We compute this capture rate for low-metallicity stars of 0.3 to 1M⊙, and find that a high fraction of these stars formed in the first dwarf galaxies would capture a primordial black hole, which would then grow by accretion up to a mass that may be close to the total star mass. We show the capture rate of primordial black holes does not depend on their mass over this asteroid-mass window, and should not be much affected by external tidal perturbations. These low-mass stellar black holes could be discovered today in low-metallicity, old binary systems in the Milky Way containing a surviving low-mass main-sequence star or a white dwarf, or via gravitational waves emitted in a merger with another compact object. No mechanisms in standard stellar evolution theory are known to form black holes of less than a Chandrasekhar mass, so detecting a low-mass black hole would fundamentally impact our understanding of stellar evolution, dark matter and the early Universe.
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Towards Powerful Probes of Neutrino Self-Interactions in Supernovae
Galactic Cosmic-Ray Propagation in the Inner Heliosphere: Improved Force-Field Model
High-energy neutrinos and gamma rays from winds and tori in active galactic nuclei
Neutron star observations of pseudoscalar-mediated dark matter
11:45 am, Friday, June 24th
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Searching for Invisible Axion Dark Matter with an 18T Magnet Haloscope
A new life for sterile neutrino dark matter after the pandemic
Supernova Dust Evolution Probed by Deep-Sea 60Fe Time History
A Lightweight Space-based Solar Power Generation and Transmission Satellite
Investigating Hadronic Interactions at Ultra-High Energies with the Pierre Auger Observatory
11:45 am, Friday, June 17th
Guest: Yu-Dai Tsai (UC, Irvine)
Title: Planetary Defense and Space Quantum Technologies for Fundamental Physics: Dark Matter, Gravity, and Cosmic Neutrinos
[https://arxiv.org/abs/2112.07674 & https://arxiv.org/abs/2107.04038]
Abstract:
I will talk about using planetary/asteroidal data and space quantum technologies to study fundamental physics.
I will first show a proposal using space quantum clocks to study solar-halo ultralight dark matter, motivated by the NASA deep space atomic clock (DSAC) and Parker Solar Probe (PSP).
We then discuss new constraints on fifth forces using asteroidal data. We will show preliminary results of the robust constraints by using the NASA JPL program and asteroid tracking data that are used for planetary defense purposes.
We then discuss model-independent constraints on any dark matter models through pure gravity.
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SpaceQ - Direct Detection of Ultralight Dark Matter with Space Quantum Sensors
Asteroid astrometry as a fifth-force and ultralight dark sector probe
Improved White Dwarves Constraints on Inelastic Dark Matter and Left-Right Symmetric Models
Neutrino lines from MeV dark matter annihilation and decay in JUNO
Searching for Afterglow: Light Dark Matter boosted by Supernova Neutrinos
One likelihood to bind them all: Lyman-α constraints on non-standard dark matter
Impact of late-time neutrino emission on the Diffuse Supernova Neutrino Background
Time-dependent, quasi-steady, and global features of fast neutrino-flavor conversion
New estimate for the contribution of the Geminga pulsar to the positron excess
Supernova Dust Evolution Probed by Deep-Sea 60Fe Time History
11:45 am, Friday, June 10th
Guest: Taylor Murphy (Ohio State)
Title: The many distinctive signals of frustrated dark matter
Abstract:
We study a renormalizable model of Dirac fermion dark matter (DM) that communicates with the Standard Model (SM) through a pair of mediators -- one scalar, one fermion -- in the representation (6,1,43) of the SM gauge group SU(3)c×SU(2)L×U(1)Y. While such assignments preclude direct coupling of the dark matter to the Standard Model at tree level, we examine the many effective operators generated at one-loop order when the mediators are heavy, and find that they are often phenomenologically relevant. We reinterpret dijet and pair-produced resonance and jets+EmissT searches at the Large Hadron Collider (LHC) in order to constrain the mediator sector, and we examine an array of DM constraints ranging from the observed relic density Ωχh2Planck to indirect and direct searches for dark matter. Tree-level annihilation, available for DM masses starting at the TeV scale, is required in order to produce Ωχh2Planck through freeze-out, but loops -- led by the dimension-five DM magnetic dipole moment -- are nonetheless able to produce signals large enough to be constrained, particularly by the XENON1T experiment. We find that the parameter space left open by experiment and compatible with freeze-out is quite small, indicating a potential need for further model-building and/or non-standard cosmologies.
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Searching for High-Energy Neutrino Emission from Galaxy Clusters with IceCube
Sharp Signals of Boson Clouds in Black Hole Binary Inspirals
PeV IceCube signals and H0 tension in the framework of Non-Local Gravity
Impact of ionization and electron density gradients in X-ray reflection spectroscopy measurements
Neutrino Rocket Jet Model: An Explanation of High-velocity Pulsars and their Spin-down Evolution
A Search for Light Fermionic Dark Matter Absorption on Electrons in PandaX-4T
General Relativistic Implicit Monte Carlo Radiation-Hydrodynamics
11:45 am, Friday, June 3rd
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Detector Requirements for Model-Independent Measurements of Ultrahigh Energy Neutrino Cross Sections
First-principle calculation of birefringence effects for in-ice radio detection of neutrinos
Cosmological constraints on decaying axion-like particles: a global analysis
The dark dimension, the Swampland, and the origin of cosmic rays beyond the GZK barrier
Dark Matter Pollution in the Diffuse Supernova Neutrino Background
Constraints on PBH as dark matter from observations: a review
Near-future discovery of point sources of ultra-high-energy neutrinos
Probing the rest-frame of the Universe with near-IR cosmic infrared background
Supernova Neutrino Decoupling Is Altered by Flavor Conversion
11:45 am, Friday, May 27th
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Detector Requirements for Model-Independent Measurements of Ultrahigh Energy Neutrino Cross Sections
Gravothermal solutions of SIDM halos: mapping from constant to velocity-dependent cross section
Searches for Neutrinos from Gamma-Ray Bursts using the IceCube Neutrino Observatory
Searches for Connections between Dark Matter and High-Energy Neutrinos with IceCube
Prospects for Detecting the Diffuse Supernova Neutrino Background with JUNO
Oscillations of High-Energy Cosmic Neutrinos in the Copious MeV Neutrino Background
A New Way To Seek Out Dark Neutrino Sectors And To Boldly Explore Multi-Dimensional Parameter Spaces
Constraining Feeble Neutrino Interactions with Ultralight Dark Matter
Supernova Fast Flavor Conversions in 1+1 D : Influence of Mu-tau neutrinos
Time-dependent interpretation of the neutrino emission from Tidal Disruption Events
Cosmology-friendly time-varying neutrino masses via the sterile neutrino portal
11:45 am, Friday, May 13th
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Guest: Jan Heisig (RWTH Aachen)
Title: Lyman-alpha constraints on freeze-in and superWIMPs
Abstract:
Dark matter (DM) from freeze-in or superWIMP production is well known to imprint non-cold DM signatures on cosmological observables. We derive constraints from Lyman-alpha forest observations for both cases, basing ourselves on a reinterpretation of the existing Lyman-alpha limits on thermal warm DM. We exclude DM masses below 15 keV for freeze-in, in good agreement with previous literature, and provide a generic lower mass bound for superWIMPs that depends on the mother particle decay width. Special emphasis is placed on the mixed scenario, where contributions from both freeze-in and superWIMP are similarly important. In this case, the imprint on cosmological observables can deviate significantly from thermal warm DM. Furthermore, we provide a modified version of the Boltzmann code class, analytic expressions for the DM distributions, and fits to the DM transfer functions that account for both mechanisms of production. For illustration, we apply the above generic limits to a coloured t-channel mediator DM model, in which case contributions from both freeze-in through scatterings and decays, as well as superWIMP production can be important. We map out the entire cosmologically viable parameter space, cornered by bounds from Lyman-alpha observations, the LHC, and Big Bang Nucleosynthesis.
Tau depolarization at very high energies for neutrino telescopes
Search for new cosmic-ray acceleration sites within the 4FGL catalog Galactic plane sources
Multi-messenger High-Energy Signatures of Decaying Dark Matter and the Effect of Background Light
The TeV Diffuse Cosmic Neutrino Spectrum and the Nature of Astrophysical Neutrino Sources
Constraining ultralight bosonic dark matter with Keck observations of S2's orbit and kinematics
A minute-long merger-driven gamma-ray burst from fast-cooling synchrotron emission
11:45 am, Friday, May 6th
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Guest: Jakob van Santen (DESY)
Title: toise: a framework to describe the performance of high-energy neutrino detectors
Abstract:
Neutrinos offer a unique window to the distant, high-energy universe. Several next-generation instruments are being designed and proposed to characterize the flux of TeV--EeV neutrinos. The projected physics reach of the detectors is often quantified with simulation studies. However, a complete Monte Carlo estimate of detector performance is costly from a computational perspective, restricting the number of detector configurations considered when designing the instruments. In this paper, we present a new Python-based software framework, toise, which forecasts the performance of a high-energy neutrino detector using parameterizations of the detector performance, such as the effective areas, angular and energy resolutions, etc. The framework can be used to forecast performance of a variety of physics analyses, including sensitivities to diffuse fluxes of neutrinos and sensitivity to both transient and steady state point sources. This parameterized approach reduces the need for extensive simulation studies in order to estimate detector performance, and allows the user to study the influence of single performance metrics, like the angular resolution, in isolation. The framework is designed to allow for multiple detector components, each with different responses and exposure times, and supports paramterization of both optical- and radio-Cherenkov (Askaryan) neutrino telescopes. In the paper, we describe the mathematical concepts behind toise and provide detailed instructive examples to introduce the reader to use of the framework.
The diffuse supernova neutrino background as a probe of late-time neutrino mass generation
Timing and Multi-Channel: Novel Method for Determining the Neutrino Mass Ordering from Supernovae
Distinguishing Dirac vs. Majorana neutrinos: a cosmological probe
Collisional dilemma: Enhancement or damping of fast flavor conversion of neutrinos
Neutrino mass and mass ordering: No conclusive evidence for normal ordering
W boson mass, dark matter and (g − 2)` in ScotoZee neutrino mass model
Axion-like Particles Implications for High-Energy Astrophysics
11:45 am, Friday, April 29th
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Detection of gamma-ray emission from the Sagittarius Dwarf Spheroidal galaxy
Observation of large scale precursor correlations between cosmic rays and earthquakes
First constraints on axion-like particles from Galactic sub-PeV gamma rays
Neutrino secret self-interactions: a booster shot for the cosmic neutrino background
11:45 am, Friday, April 22th
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The Sensitivity of Future Gamma-Ray Telescopes to Primordial Black Holes
Simulation of the LSD Response to the Neutrino Burst from SN 1987A
Independent determination of the Earth's orbital parameters with solar neutrinos in Borexino
Detecting High-Energy Neutrino Minibursts from Local Supernovae with Multiple Neutrino Observatories
Simulating neutrino echoes induced by secret neutrino interactions
Time-delayed neutrino emission from supernovae as a probe of dark matter-neutrino interactions
Thermal Friction as a Solution to the Hubble and Large-Scale Structure Tensions
11:45 am, Friday, April 15th
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Visible Neutrino Decays and the Impact of the Daughter-Neutrino Mass
The Sensitivity of Future Gamma-Ray Telescopes to Primordial Black Holes
High-precision measurement of theW boson mass with the CDF II detector
11:45 am, Friday, April 1st
Guest: Pedro De la Torre Luque (Stockholm University)
Title: The FLUKA cross sections for cosmic-ray propagation
Abstract:
While the accuracy of current cosmic-ray (CR) data allows us to carry out precise tests of our models of propagation of charged particles in the Galaxy, the precision of cross sections data for the production of secondary particles (secondary CRs, neutrinos, gamma rays) is very poor, considerably limiting these tests. Given that most of the calculations of these cross sections from fundamental models of particle interactions are in disagreement with data, we rely on parameterizations fitted to the very scarce and uncertain experimental data.
In the last years, the FLUKA Monte Carlo nuclear toolkit has been optimized to be used in different kinds of CR studies and has been extensively tested against data. In this talk, we present new sets of spallation cross sections of CR interactions in the Galaxy, both inelastic and inclusive, computed with FLUKA. Furthermore, these cross sections have been implemented in the DRAGON2 code to characterize the spectra of CR nuclei up to Z=26 (Iron) and study the main propagation parameters predicted from the spectra of secondary CRs such as B, Be and Li. These results and their implications will be discussed in the talk.
Guest: Akaxia Cruz (Washington U., Seattle)
Title: Astrophysical Plasma Instabilities induced by Long-Range Interacting Dark Matter
Abstract:
If dark matter (DM) is millicharged or darkly charged, collective plasma processes may dominate momentum exchange over direct particle collisions. In particular, plasma streaming instabilities can couple the momentum of DM to counter-streaming baryons or other DM and result in the counter-streaming fluids coming to rest with each other, just as happens for baryonic collisionless shocks in astrophysical systems. While electrostatic plasma instabilities (such as the two stream) are highly suppressed by Landau damping in the cosmological situations of interest, electromagnetic instabilities such as the Weibel can couple the momenta. Their growth rates are slower than the prior assumption that they would grow at the plasma frequency of DM. We find that the streaming of DM in the pre-Recombination universe is affected more strongly by direct collisions than collective processes, validating previous constraints. However, when considering unmagnetized instabilities the properties of the Bullet Cluster merger would be substantially altered if [qχ/mχ]≳10−4[q_\chi/m_\chi] \gtrsim 10^{-4}[qχ/mχ]≳10−4, where [qχ/mχ][qχ/mχ]][qχ/mχ] is the charge-to-mass ratio of DM relative to that of the proton. When a magnetic field is added consistent with cluster observations, Weibel and Firehose instabilities result in the constraint [qχ/mχ]≳10−12−10−11[qχ/mχ]] \gtrsim 10^{-12}-10^{-11}[qχ/mχ]≳10−12−10−11. The constraints are even stronger in the case of a dark U(1)U(1)U(1) charge, ruling out [qχ/mχ]≳10−14[qχ/mχ]] \gtrsim 10^{-14}[qχ/mχ]≳10−14 in the Bullet Cluster system. The strongest previous limits on millicharged DM arise from considering the spin down of galactic disks. We show that plasma instabilities or tangled background magnetic fields could lead to diffusive propagation of DM, weakening these spin down limits. Thus, our constraints from considering plasma instabilities are the most stringent over much of the millicharged and especially dark-charged parameter space.
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FLUKA cross sections for cosmic-ray interactions with the DRAGON2 code
Astrophysical Plasma Instabilities induced by Long-Range Interacting Dark Matter
Observing the inner parsec-scale region of candidate neutrino-emitting blazars
Multiwavelength search for the origin of IceCube's neutrinos
Neutrino Masses and Mass Hierarchy: Evidence for the Normal Hierarchy
Axion signatures from supernova explosions through the nucleon electric-dipole portal
Fast Neutrino Conversion in Hydrodynamic Simulations of Neutrino-Cooled Accretion Disks
Searching for neutrino emissions from multi-frequency sources
Social distancing between particles and objects in the Universe
Neutrino follow-up with the Zwicky Transient Facility: Results from the first 24 campaigns
11:45 am, Friday, March 25th
Guest: Kayla Leonard (UW–Madison)
Title: Low Energy Event Reconstruction in IceCube DeepCore
Abstract:
The reconstruction of event-level information, such as the direction or energy of a neutrino interacting in IceCube DeepCore, is a crucial ingredient to many physics analyses. Algorithms to extract this high level information from the detector’s raw data have been successfully developed and used for high energy events. In this work, we address unique challenges associated with the reconstruction of lower energy events in the range of a few to hundreds of GeV and present two separate, state-of-the-art algorithms. One algorithm focuses on the fast directional reconstruction of events based on unscattered light. The second algorithm is a likelihood-based multipurpose reconstruction offering superior resolutions, at the expense of larger computational cost.
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Constraining ultra-high-energy cosmic ray composition through cross-correlations
Signatures of anisotropic diffusion around PeVatrons in 100 TeV gamma-ray data
A simple determination of the halo size L from 10Be/9Be data
Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor
Neutrino interactions with ultralight axion-like dark matter
A substandard candle: the low-ν method at few-GeV neutrino energies
11:45 am, Friday, March 11th
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Constraining Axion-Like Particles with HAWC Observations of TeV Blazars
Signal model and event reconstruction for the radio detection of inclined air showers
A parametric approach for the identification of single-charged isotopes with AMS-02
Cosmic-void observations reconciled with primordial magnetogenesis
11:45 am, Friday, March 4th
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Matching resummed endpoint and continuum γ-ray spectra from dark-matter annihilation
Observing Axion Emission from Supernova with Collider Detectors
Constraining heavy axion-like particles by energy deposition in Globular Cluster stars
Cooling of Neutron Stars admixed with Light Dark Matter: a case study
Astrophysical Plasma Instabilities induced by Long-Range Interacting Dark Matter
Constraints on dark matter self-interaction from galactic core size
11:45 am, Friday, Feb 25th
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Photon-ALP oscillations inducing modification on γ-ray polarization
Bounds on sterile neutrino lifetime and mixing angle with active neutrinos by global 21 cm signal
Radio Constraints on r-process Nucleosynthesis by Collapsars
Spectra of Cosmic Ray Sodium and Aluminum and Unexpected Aluminum Excess
Prospects for Distinguishing Supernova Models Using a Future Neutrino Signal
Implications of the first evidence for coherent elastic scattering of reactor neutrinos
Suggestive evidence for coherent elastic neutrino-nucleus scattering from reactor antineutrinos
11:45 am, Friday, Feb 18th
Guest: Andrea Caputo (Weizmann Institute of Science)
Title: Low-Energy Supernovae Severely Constrain Radiative Particle Decays
Abstract:
The hot and dense core formed in the collapse of a massive star is a powerful source of hypothetical feebly-interacting particles such as sterile neutrinos, dark photons, axion-like particles (ALPs), and others. Radiative decays such as a→2γ deposit this energy in the surrounding material if the mean free path is less than the radius of the progenitor star. For the first time, we use a supernova (SN) population with particularly low explosion energies as the most sensitive calorimeters to constrain this possibility. These SNe are observationally identified as low-luminosity events with low ejecta velocities and low masses of ejected 56Ni. Their low energies limit the energy deposition from particle decays to less than about 0.1 B, where 1 B (bethe)=1051 erg. For 1-500 MeV-mass ALPs, this generic argument excludes ALP-photon couplings Gaγγ in the 10−10-10−8 GeV−1 range.
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A low-threshold ultrahigh-energy neutrino search with the Askaryan Radio Array
Bounds on sterile neutrino lifetime and mixing angle with active neutrinos by global 21 cm signal
Polarisation signatures in radio for inclined cosmic-ray induced air-shower identification
Multifrequency Array Calibration in Presence of Radio Frequency Interferences
Galactic center gamma-ray production by cosmic rays from stellar winds and Sgr A East
11:45 am, Friday, Feb 11th
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Anisotropies of ultrahigh-energy cosmic rays in a scenario with nearby sources
PKS 1424+240: yet another masquerading BL Lac object as a possible IceCube neutrino source
Neutrino Flavor Conversions in High-Density Astrophysical and Cosmological Environments
Propagation of cosmic rays in plasmoids of AGN jets -- implications for multimessenger predictions
11:45 am, Friday, Feb 4th
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A novel search for high-frequency gravitational waves with low-mass axion haloscopes
Contribution to the extragalactic neutrino background from dense environment of GRB jets
First limits on neutrino electromagnetic properties from the CONUS experiment
Primordial Black Hole Dark Matter in the Context of Extra Dimensions
11:30 am, Friday, Jan 28th
Guest: Kanji Mori (Research Institute of Stellar Explosive Phenomena, Fukuoka University)
Title: Shock Revival in Core-collapse Supernovae Assisted by Heavy Axion-like Particles
Abstract:
Axion-like particles (ALPs) are a class of hypothetical pseudoscalar particles which feebly interact with ordinary matter. The hot plasma of stars and core-collapse supernovae is a possible laboratory to explore physics beyond the standard model including ALPs. Once produced in a supernova, some of the ALPs can be absorbed by the supernova matter and affect energy transfer. We recently calculated the ALP emission in core-collapse supernovae and the backreaction on supernova dynamics consistently. It is found that the stalled bounce shock can be revived if the coupling between ALPs and photons is as high as $g_{a\gamma}\sim 10^{-9}$ GeV$^{-1}$ and the ALP mass is 40-400 MeV.
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Shock Revival in Core-collapse Supernovae Assisted by Heavy Axion-like Particles
Simulation of Nuclear Recoils due to Supernova Neutrino-induced Neutrons in Liquid Xenon Detectors
Squeezing Cosmological Phase Transitions with International Pulsar Timing Array
Low-Energy Supernovae Severely Constrain Radiative Particle Decays
γ-ray Emission from Classical Nova V392 Per: Measurements from Fermi and HAWC
Constrains of the axion-like particle from black hole spin superradiance
Search for solar atmospheric neutrinos with the ANTARES neutrino telescope
11:45 am, Friday, Jan 21st
Guest: Anna Suliga (Bohr Inst., UC, Berkeley, Wisconsin U., Madison, and DARK Cosmology Ctr.)
Title: Towards Probing the Diffuse Supernova Neutrino Background in All Flavors
Abstract:
Fully understanding the average core-collapse supernova requires detecting the diffuse supernova neutrino background (DSNB) in all flavors. While the DSNB \bar{νe} flux is near detection, and the DSNB νe flux has a good upper limit and promising prospects for improved sensitivity, the DSNB νx (each of νμ, ντ, \bar{νμ}, \bar{ντ}) flux has a poor limit and heretofore had no clear path for improved sensitivity. We show that a succession of xenon-based dark matter detectors -- XENON1T (completed), XENONnT (under construction), and DARWIN (proposed) -- can dramatically improve sensitivity to DSNB νx the neutrino-nucleus coherent scattering channel. XENON1T could match the present sensitivity of ∼ 10^3 cm^(−2) s^(−1) per νx flavor, XENONnT would have linear improvement of sensitivity with exposure, and a long run of DARWIN could reach a flux sensitivity of ∼ 10 cm^(−2) s^(−1). Together, these would also contribute to greatly improve bounds on non-standard scenarios. Ultimately, to reach the standard flux range of ∼ 1 cm^(−2) s^(−1), even larger exposures will be needed, which we show may be possible with the series of proposed lead-based RES-NOVA detectors.
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11:45 am, Friday, Jan 14th
Guest: Yu-Dai Tsai (UC, Irvine and Fermilab and Chicago U. ,KICP)
Title: SpaceQ -- Direct Detection of Ultralight Dark Matter with Space Quantum Sensors
Abstract:
Recent advances in quantum sensors, including atomic clocks, enable searches for a broad range of dark matter candidates. The question of the dark matter distribution in the Solar system critically affects the reach of dark matter direct detection experiments. Partly motivated by the NASA Deep Space Atomic Clock (DSAC), we show that space quantum sensors present new opportunities for ultralight dark matter searches, especially for dark matter states bound to the Sun. We show that space quantum sensors can probe unexplored parameter space of ultralight dark matter, covering theoretical relaxion targets motivated by naturalness and Higgs mixing. If an atomic clock were able to make measurements on the interior of the solar system, it could probe this highly sensitive region directly and set very strong constraints on the existence of such a bound-state halo in our solar system. We present sensitivity projections for space-based probes of ultralight dark matter which couples to electron, photon, and gluon fields, based on current and future atomic, molecular, and nuclear clocks.
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SpaceQ -- Direct Detection of Ultralight Dark Matter with Space Quantum Sensors
[Nature] Star formation near the Sun is driven by expansion of the Local Bubble
Simulation Study of the Relative Askaryan Fraction at the South Pole
Radiation Effects from ISM and Cosmic Ray Particle Impacts on Relativistic Spacecraft
Galactic gamma-ray and neutrino emission from interacting cosmic-ray nuclei
Ultrahigh-energy Gamma-Ray Radiation from the Crab Pulsar Wind Nebula
11:45 am, Friday, Jan 7th
Guest: Federica Bradascio (IRFU, Saclay)
Title: A search for neutrino emission from cores of Active Galactic Nuclei
Abstract:
The sources of the majority of the high-energy astrophysical neutrinos observed with the IceCube neutrino telescope at the South Pole are unknown. So far, only a gamma-ray blazar was compellingly associated with the emission of high-energy neutrinos. In addition, several studies suggest that the neutrino emission from the gamma-ray blazar population only accounts for a small fraction of the total astrophysical neutrino flux. In this work we probe the production of high-energy neutrinos in the cores of Active Galactic Nuclei (AGN), induced by accelerated cosmic rays in the accretion disk region. We present a likelihood analysis based on eight years of IceCube data, searching for a cumulative neutrino signal from three AGN samples created for this work. The neutrino emission is assumed to be proportional to the accretion disk luminosity estimated from the soft X-ray flux. Next to the observed soft X-ray flux, the objects for the three samples have been selected based on their radio emission and infrared color properties. For the largest sample in this search, an excess of high-energy neutrino events with respect to an isotropic background of atmospheric andastrophysical neutrinos is found, corresponding to a post-trial significance of 2.60 sigma. . Assuming a power-law spectrum, the best-fit spectral index is 2.03^{+0.14}_{-0.11}, consistent with expectations from particle acceleration in astrophysical sources. If interpreted as a genuine signal with the assumptions of a proportionality of X-ray and neutrino fluxes and a model for the sub-threshold flux distribution, this observation implies that at 100 TeV, 27% - 100% of the observed neutrinos arise from particle acceleration in the core of AGN.
Guest: Simeon Reusch (DESY)
Title: Neutrinos from tidal disruption and accretion events
Abstract:
The origins of the high-energy cosmic neutrino flux remain largely unknown. Last year, a high-energy neutrino was associated with the tidal disruption event (TDE) AT2019dsg by our group. I will present AT2019fdr, an exceptionally luminous TDE candidate, coincident with another high-energy neutrino detected by IceCube. I will present observations that further support a TDE origin of this flare. These include a bright dust echo and soft late-time X-ray emission. The probability of finding two such bright events in neutrino follow-up by chance is just 0.034%. Furthermore, we have evaluated several models for neutrino production and can show that AT2019fdr is capable of producing the observed high-energy neutrino. I will also present further evidence on accretion events accompanied by luminous dust echoes being connected to high-energy neutrinos, as we have found another event with such a signature coincident with a high-energy neutrino (AT2019aalc). This reinforces the case for TDEs as neutrino sources.
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A search for neutrino emission from cores of Active Galactic Nuclei
The candidate tidal disruption event AT2019fdr coincident with a high-energy neutrino
Towards Probing the Diffuse Supernova Neutrino Background in All Flavors
Luminosity functions consistent with a pulsar-dominated Galactic Center Excess
The Return of the Templates: Revisiting the Galactic Center Excess with Multi-Messenger Observations
Solar mass black holes from neutron stars and bosonic dark matter
Diffuse flux of PeV neutrinos from centrifugally accelerated protons in active galactic nuclei
2021
11:45 am, Friday, Dec 17th
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Shock Revival in Core-collapse Supernovae Assisted by Heavy Axion-like Particles
The Spectra of IceCube Neutrino (SIN) candidate sources - II. Source Characterisation
Reconciling ultra-high-energy diffuse γ-rays and the knee of cosmic ray light nuclei
A search for correlated low-energy electron antineutrinos in KamLAND with gamma-ray bursts
11:45 am, Friday, Dec 10th
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Numerical Study of Cosmic Ray Confinement through Dust Resonant Drag Instabilities
Space applications of GAGG:Ce scintillators: a study of afterglow emission by proton irradiation
Audio Universe Tour of the Solar System: using sound to make the Universe more accessible
Identifying mass composition of ultra-high-energy cosmic rays using deep learning
Improving sensitivity of the ARIANNA detector by rejecting thermal noise with deep learning
11:45 am, Friday, Dec 3rd
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Guest: Payel Mukhopadhyay (Stanford)
Title: Supernova outflows - From Hydrodynamics to Nucleosynthesis
Abstract:
Neutrino driven outflow hydrodynamics in core-collapse supernovae can have a profound impact on the detectable neutrino oscillation signatures. Additionally, the hydrodynamics of these outflows impact the yields of p-nuclides such as Molybdenum and Ruthenium whose abundance in solar system is a mystery. In this talk, I show that neutrino driven outflows possess a special property known as near-criticality which, in turn impacts the observed neutrino signals in DUNE. Additionally, I show that a self-consistent treatment of outflow hydrodynamics also makes core-collapse supernovae an attractive candidate for the so called nu p- process, proving clue to the origin of isotopes like 92,94 Mo and 96,98 Ru in the Solar System.
MicroBooNE and the νe Interpretation of the MiniBooNE Low-Energy Excess
Search for GeV-scale Dark Matter Annihilation in the Sun with IceCube DeepCore
Improved Characterization of the Astrophysical Muon-Neutrino Flux with 9.5 Years of IceCube Data
Unveiling the Fermi Bubbles origin with MeV photon telescopes
A search for neutrino emission from cores of Active Galactic Nuclei
The candidate tidal disruption event AT2019fdr coincident with a high-energy neutrino
Audible Axions with a Booster: Stochastic Gravitational Waves from Rotating ALPs
A Compact High-Resolution Muon Spectrometer Using Multi-Layer Gas Cherenkov Radiators
Cosmic Neutrino Background Detection in Large-Neutrino-Mass Cosmologies
Search for Low-Energy Signals from Fast Radio Bursts with the Borexino Detector
11:45 am, Friday, Nov 19th
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Guest: Anupam Ray (Tata Institute Of Fundamental Research)
Title: Unravelling the Mystery of Dark Matter with Black Holes
Abstract:
Primordial black holes (PBHs), possibly formed via gravitational collapse of large density perturbations in the very early universe, are one of the earliest proposed and viable dark matter (DM) candidates. PBHs can make up a large or even entirety of DM over a wide range of masses. Ultralight PBHs in the mass range of 10^{15} - 10^{17} g, emit particles via Hawking radiation, act as a decaying DM, and can be probed via observations of those emitted particles in various space as well as ground based detectors. In this talk, I will discuss how diffuse supernova neutrino background searches at the Super-Kamiokande neutrino observatory, measurement of the 511 keV gamma-ray line by INTEGRAL telescope, observations of low energy Galactic Center photons by the imminent soft gamma-ray telescope AMEGO, and EDGES measurement of the global 21-cm signal can set robust, world-leading exclusions on the fraction of DM composed of ultralight PBHs. Finally, I will also discuss a novel formation mechanism of low mass transmuted black holes which can be a viable non-primordial solution to sub-Chandrasekhar mass, pointing out several avenues to test the transmuted origin of low mass black holes.
Guest: Yuanhong Qu (University of Nevada, Las Vegas)
Title: Neutrino emission from FRB-emitting magnetars
Abstract:
The detection of FRB 200428 in association with a hard X-ray burst from the Galactic magnetar SGR 1935+2154 suggests that magnetars can make FRBs.We study possible neutrino emission from FRB-emitting magnetars by developing a general theoretical framework. We consider three different sites for proton acceleration and neutrino emission, i.e. within the magnetosphere, in the current sheet region beyond the light cylinder, and in relativistic shocks far away from the magnetosphere. All three scenarios can allow protons to be accelerated to high enough energies to interact with 10 − 200 keV X-ray photons to produce neutrinos. Different cooling processes for protons and pions are considered to calculate the neutrino emission suppression factor within each scenario. We find that the flux of the neutrino emission decreases with increasing radius from the magnetar due to the decrease of the target photon number density. We calculate the neutrino flux from FRB 200428 and its associated X-ray burst. The flux of the most optimistic case invoking magnetospheric proton acceleration is still ∼ 4 orders of magnitude below the IceCube sensitivity. We also estimate the diffuse neutrino background from all FRB-emitting magnetars in the universe. The total neutrino flux of magnetars during their FRB emission phases is a negligible fraction of observed diffuse emission even under the most optimistic magnetospheric scenario for neutrino emission. However, if one assumes that many more X-ray bursts without FRB associations can also produce neutrinos with similar mechanisms, magnetars can contribute up to 10^(−8) GeV s^(−1) sr^(−1) cm^(−2) diffuse neutrino background flux in the GeV to multi-TeV range. Future detection or non-detection of neutrinos from bright Galactic magnetar-associated FRBs may provide a diagnosis on the particle acceleration site in FRB-emitting magnetars.
The Contribution From TeV Halos to the Isotropic Gamma-Ray Background
Search for Quantum Gravity Using Astrophysical Neutrino Flavour with IceCube
Turbulence and particle acceleration in a relativistic plasma
Shock acceleration with oblique and turbulent magnetic fields
For suggestions of cool papers on arXiv, email me: esteban.6(-@-)osu.edu
11:45 am, Friday, Nov 12th
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Guest: Rostom Mbarek (University of Chicago)
Title: Ultra-High-Energy Cosmic Rays and Neutrinos from relativistic jets of Active Galactic Nuclei
Abstract:
In Mbarek & Caprioli (2019), we laid the groundwork for studying the espresso paradigm Caprioli (2015), a reacceleration mechanism to boost galactic cosmic rays (CRs) to Ultra-High-Energy CR (UHECR) levels. Our bottom-up approach uses realistic 3D MHD simulations of relativistic AGN jets and accounts for all of the crucial ingredients of a universal acceleration theory: injection, acceleration, and escape in realistic environments. Our results are consistent with the main features of UHECR spectra, i.e., power-law slopes, chemical composition, and anisotropy. In Mbarek & Caprioli (2021), we refine our model by including sub-grid particle scattering to model small-scale magnetic turbulence that cannot be resolved by MHD simulations, constraining for the first time one crucial but hard-to-model ingredient, and allowing us to establish the relative importance of espresso and stochastic shear acceleration in relativistic jets. Here, we analyze high-energy neutrinos produced from our accelerated UHECRs considering the effects of external photon fields, and incorporate nucleus photodisintegration. We find that UHECRs are not significantly affected by photodisintegration in AGN jets, which is consistent with Auger's detection of heavy elements at the highest energies. We also note that the source neutrino flux at E>1e17 eV is comparable to that of cosmogenic neutrinos, and that the steady neutrino emission from AGN jets cannot solely account for IceCube's signal.
Shock acceleration with oblique and turbulent magnetic fields
Turbulence and particle acceleration in a relativistic plasma
Fermi-LAT detection of extended gamma-ray emission in the vicinity of SNR G045.7−00.4
Search for Quantum Gravity Using Astrophysical Neutrino Flavour with IceCube
The Contribution From TeV Halos to the Isotropic Gamma-Ray Background
Galactic cosmic ray propagation through M dwarf planetary systems
11:45 am, Friday, Nov 5th
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Impact of biaxial birefringence on signal polarization in radio detection of neutrinos in polar ice
Direct Detection of Hawking Radiation from Asteroid-Mass Primordial Black Holes
Premature Black Hole Death of Population III Stars by Dark Matter
Muonphilic Dark Matter explanation of gamma-ray galactic center excess: a comprehensive analysis
Self-Generated Cosmic-Ray Turbulence Can Explain the Morphology of TeV Halos
A Helioscope for Gravitationally Bound Millicharged Particles
11:45 am, Friday, Oct 29th via Zoom
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Guest: Pedro Machado (Fermilab)
Title: Atmospheric neutrinos at DUNE
Abstract:
In this talk I will discuss how DUNE can leverage its liquid argon time projection chamber (LArTPC) technology to study atmospheric neutrinos. Because of the event reconstruction in LArTPCs, DUNE can use the large atmospheric neutrino flux below 1 GeV to do several physics analysis, including CP violation and Earth tomography.
Guest: Javier Acevedo (Queen's U)
Title: Detecting Composite Dark Matter with Bremsstrahlung and the Migdal Effect
Abstract:
An intriguing possibility for dark matter is that it formed bound states in the early Universe, much like the Standard Model fundamental particles formed nucleons, nuclei, and atoms, in a scenario called “composite” dark matter. One of the simplest composite dark matter models consists of dark matter fermions bound together by a real scalar field. Composite states that are massive enough source a scalar field so intense that nuclei, when coupled to this binding field, accelerate upon contact to energies capable of various collisional processes, including ionization, thermal bremsstrahlung, and even nuclear fusion. Such observable effects occur even when the coupling between nuclei and the binding field is vanishingly small, and have implications for the detection of dark matter through experiments as well as astrophysical observations. In this talk, I will discuss the detection prospects for these composite states by considering the Migdal effect at dark matter direct detection experiments, and thermal bremsstrahlung at large neutrino observatories.
Accelerating Composite Dark Matter Discovery with Nuclear Recoils and the Migdal Effect
A Test for Cosmological Parity Violation Using the 3D Distribution of Galaxies
11:45 am, Friday, Oct 22nd via Zoom
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Guest: Tarak Nath Maity (Indian Institute of Science)
Title: A search for dark matter using sub- PeV γ-rays observed by Tibet ASγ
Abstract:
The discovery of diffuse sub-PeV gamma-rays by the Tibet ASγ collaboration promises to revolutionize our understanding of the high-energy astrophysical universe. It has been shown that this data broadly agrees with prior theoretical expectations. In this talk, we will explore the impact of this discovery on a well-motivated new physics scenario: PeV-scale decaying dark matter (DM). Considering a wide range of final states in DM decay, a number of DM density profiles, and numerous astrophysical background models, we find that this data provides the most stringent limit on DM lifetime for various Standard Model final states. In particular, we find that the strongest constraints are derived for DM masses in between a few PeV to few tens of PeV.
Dimuons in Neutrino Telescopes: New Predictions and First Candidates in IceCube
Mirror diffusion of cosmic rays in highly compressible turbulence near supernova remnants
Impact of biaxial birefringence on signal polarization in radio detection of neutrinos in polar ice
Direct Detection of Hawking Radiation from Asteroid-Mass Primordial Black Holes
11:45 am, Friday, Oct 8th via Zoom
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Guest: Julia Gehrlein (BNL)
Title: Connecting the Extremes: A Story of Supermassive Black Holes and Ultralight Dark Matter
Abstract:
The formation of ultra rare supermassive black holes (SMBHs), with masses of O(10^9 M⊙), in the first billion years of the Universe remains an open question in astrophysics. At the same time, ultralight dark matter (DM) with mass in the vicinity of O(10^(−20) eV) has been motivated by small scale DM distributions. Though this type of DM is constrained by various astrophysical considerations, certain observations could be pointing to modest evidence for it. We present a model with a confining first order phase transition at ∼ 10 keV temperatures, facilitating production of O(10^9 M⊙) primordial SMBHs. Such a phase transition can also naturally lead to the implied mass for a motivated ultralight axion DM candidate, suggesting that SMBHs and ultralight DM may be two sides of the same cosmic coin. We consider constraints and avenues to discovery from superradiance and a modification to Neff . On general grounds, we also expect primordial gravitational waves – from the assumed first order phase transition – characterized by frequencies of O(10^(−12) − 10^(−9) Hz). This frequency regime is largely uncharted, but could be accessible to pulsar timing arrays if the primordial gravitational waves are at the higher end of this frequency range, as could be the case in our assumed confining phase transition.
11:45 am, Friday, Oct 1st via Zoom
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Soft gamma rays from low accreting supermassive black holes and connection to energetic neutrinos
Reconciling Cosmic-Ray Transport Theory with Phenomenological Models Motivated by Milky-Way Data
Binary black hole mergers from young massive clusters in the pair-instability supernova mass gap
Constraining Time Dependent Dark Matter Signals from the Sun
Neutrino Echos following Black Hole Formation in Core-Collapse Supernovae
Search for Relativistic Magnetic Monopoles with Eight Years of IceCube Data
First Leptophobic Dark Matter Search from Coherent CAPTAIN-Mills
Nuclear fusion catalyzed by doubly charged scalars: Implications for energy production
11:45 am, Friday, Sep 24th via Zoom
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Guest: Nirmal Raj (TRIUMF)
Title: Dark Matter Direct Detection in an Inter-Clump Void
Abstract:
On sub-kiloparsec scales dark matter could cluster and form compact subhalos, in which the majority of Galactic dark matter could reside. Null results in direct detection experiments since their advent four decades ago could then be the result of extremely rare encounters between the Earth and these subhalos. I present alternative and promising means to identify subhalo dark matter interacting with Standard Model particles: (1) subhalo collisions with old neutron stars can transfer kinetic energy and brighten the latter to luminosities within the reach of imminent infrared, optical, and ultraviolet telescopes; this already sets bounds on self-interacting dark matter in subhalos from the coldest known neutron star, (2) subhalo dark matter scattering with cosmic rays results in detectable effects, (3) historic Earth-subhalo encounters can leave dark matter tracks in paleolithic minerals deep underground. These searches, which are highly complementary to microlensing surveys, could discover dark matter subhalos over vast parametric ranges, between the masses of a typical lake and a typical star, with corresponding dark matter cross sections and masses spanning tens of orders of magnitude.
Scattering searches for dark matter in subhalos: neutron stars, cosmic rays, and old rocks
Can Primordial Black Holes as all Dark Matter explain Fast Radio Bursts?
LC Circuits for the Direct Detection of Ultralight Dark Matter Candidates
Magnetic topology in coupled binaries, spin-orbital resonances, and flares
For suggestions of cool papers on arXiv, email me: esteban.6(-@-)osu.edu
11:45 am, Friday, Sep 10th via Zoom
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Non-thermal emission from young supernova remnants in dense circumstellar environments
Scattering searches for dark matter in subhalos: neutron stars, cosmic rays, and old rocks
Directional Detection of Light Dark Matter in Superconductors
Predicting the Magnetic Fields of a Stealth CME Detected by Parker Solar Probe at 0.5 AU
Testing Self-Organized Criticality Across the Main Sequence using Stellar Flares from TESS
Can Primordial Black Holes as all Dark Matter explain Fast Radio Bursts?
The diffuse γ-ray background is dominated by star-forming galaxies
LHAASO discovery of highest-energy photons towards new physics
11:45 am, Friday, Sep 10th via Zoom
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Probing Current Sheet Instabilities from Flare Ribbon Dynamics
Connecting the Extremes: A Story of Supermassive Black Holes and Ultralight Dark Matter
Search for dark matter annihilation signals from UFOs with H.E.S.S
Overview of Cherenkov Telescope on-board EUSO-SPB2 for the Detection of Very-High-Energy Neutrinos
What powers the radio emission in TDE AT2019dsg: a long-lived jet or the disruption itself?
Reticulum II: Particle Dark Matter and Primordial Black Holes Limits
11:45 am, Friday, Sep 3rd via Zoom
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Guest: Daichi Tsuna (Tokyo U)
Title: Observing the Traces of Black Hole Formation
Abstract:
Failed explosion of massive stars is considered to be the main channel to form stellar-mass black holes seen in electromagnetic and gravitational waves. Though we likely cannot see these events as spectacular supernovae, mass ejection can still occur due to weakening of gravity when the central core emits neutrinos. In this talk I will discuss our recent predictions on the observational consequence of these events, focusing on emission when the ejected material sweeps up the surrounding matter.
Detecting Axion Dark Matter through the Radio Signal from Omega Centauri
Investigating the energy distribution of the high-energy particles in the Crab nebula
11:45 am, Friday, Aug 27th via Zoom
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Guest: Jose Carpio (PSU)
Abstract:
In light of the recent Muon g − 2 experiment data from Fermilab, we investigate the implications of a gauged Lµ − Lτ model for high energy neutrino telescopes. It has been suggested that a new gauge boson at the MeV scale can both account for the Muon g −2 data and alleviate the tension in the Hubble parameter measurements. It also strikes signals at IceCube from the predicted resonance scattering between high-energy neutrinos and the cosmic neutrino background. We revisit this model based on the latest IceCube shower data, and perform a four-parameter fit to find a preferred region. While the data are consistent with the absence of resonant signatures from secret interactions, we find the preferred region consistent with the muon g − 2 anomaly and Hubble tension. We demonstrate that future neutrino telescopes such as IceCube-Gen2 can probe this unique parameter space, and point out that successful measurements would infer the neutrino mass with 0.05 eV <~ Σmν <~ 0.3 eV.
Comparison of simulated neutrino emission models with data on Supernova 1987A
THE UNCERTAIN FUTURE OF MASSIVE BINARIES OBSCURES THE ORIGIN OF LIGO/VIRGO SOURCES
11:45 am, Friday, Aug 20th via Zoom
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with the passcode: 984288
Guest: Anirban Das (SLAC)
Title: 'Direct Detection' of Dark Asteroids
Abstract:
Macroscopic dark matter is mostly unconstrained over a wide asteroid-mass range, where it could scatter on visible matter with geometric cross section. In this talk, I shall describe when such a 'dark asteroid' travels through a star, it produces shock waves which reach the stellar surface, and gives out distinctive transient optical, UV and X-ray emission. This signature can be searched for on a variety of stellar types and locations. In a dense globular cluster, such events occur far more often than stellar flares. An existing UV telescope, such as the Hubble Telescope, could probe orders of magnitude in dark asteroid mass in one week of dedicated observation.
Flavor-specific Interaction Favors StrongNeutrino Self-coupling in the Early Universe
Comment on “New Freezeout Mechanism for Strongly Interacting Dark Matter”
Ultrahigh energy cosmic rays and high energy astrophysical neutrinos
Understanding and visualizing the statistical analysis of SN1987A neutrino data
An Archival Search for Very-High-Energy Counterparts to Sub-Threshold Neutron-Star Merger Candidates
A Posterior Analysis on IceCube Double Pulse TauNeutrino Candidates
11:45 am, Friday, August 13 via Zoom
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with the ID: 994 3702 4737 and password: 102987
Probing Secret Interactions of Astrophysical Neutrinos in the High-Statistics Era
Dark Matter from Axion Strings with Adaptive Mesh Refinement
EDGES data as a signal of the Stueckelberg mechanism in the early universe
Electroweak baryogenesis from light fermion sources: a critical study
Dark matter capture and annihilation in stars: Impact on the red giant branch tip
11:45 am, Friday, August 7 via Zoom
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with the ID: 993 1044 3456 and password: 451761
Probing Secret Interactions of Astrophysical Neutrinos in the High-Statistics Era
Filtered asymmetric dark matter during the Peccei-Quinn phase transition
The Secret Higgstory of the Highest Temperature during Reheating
Constraints on heavy decaying dark matter with current gamma-ray measurements
11:45 am, Friday, July 30th via Zoom
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Zoom ID: 915 9772 6964
with the password: 659271
Guest: Mike Pajkos (MSU)
Title: Interpreting Core-collapse Multimessenger Signals Using Supernova Simulations
Abstract:
As some of the most energetic events in the universe, core-collapse supernovae (CCSNe) act as effective laboratories for many areas of physics that occur on a variety of length scales. With electromagnetic and multimessenger observatories constantly improving sensitivities, astronomers stand poised to constrain the physics within these high energy laboratories using a variety of signals. This talk reviews results from high-fidelity multiphysics simulations, connecting the expected gravitational waves produced in a core-collapse event to the internal supernova physics. Likewise, it highlights relationships between the neutrino production and the CCSN evolution. Lastly, this talk outlines additions to the FLASH multiphysics code that improve the predictive power of numerical models for supernova multimessenger signals.
11:45 am, Friday, July 23th via Zoom
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with the password: 358863
Flavor-Violating Higgs Decays andStellar Cooling Anomalies in Axion Models
Gamma-ray line from electroweakly interactingnon-abelian spin-1 dark matter
The Simplest and Most Predictive Model of Muong−2and Thermal Dark Matter
Towards a Higgs mass determination in asymptoticallysafe gravity with a dark portal
Probing dark gauge boson with observations fromneutron stars
11:45 am, Friday, July 16th via Zoom
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Complementarity between dark matter direct searches and CEνNS experiments in U(1)′ models
The Mass Distribution of Neutron Stars in Gravitational-Wave Binaries
Bridging the μHz gap in the gravitational-wave landscape with binary resonance
Constraining positron emission from pulsar populations with AMS-02 data
Neutrino Telescope in Lake Baikal: Present and Nearest Future
Asteroid g-2 experiments: new fifth force and ultralight dark sector tests
11:45 am, Friday, July 9th via Zoom
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with the passcode: 55688
Guest: Claire Guépin (UMD)
Title: Indirect dark matter searches at ultrahigh energy neutrino detectors
Abstract:
High to ultrahigh energy neutrino detectors can uniquely probe the properties of dark matter χ by searching for the secondary products produced through annihilation and/or decay processes. We evaluate the sensitivities to dark matter thermally averaged annihilation cross section <σv> and partial decay width into neutrinos Γχ→νν¯ (in the mass scale 10^7 ≤ mχ/GeV ≤ 10^15) for next generation observatories like POEMMA and GRAND. We show that in the range 10^7 ≤ mχ/GeV ≤ 10^11, space-based Cherenkov detectors like POEMMA have the advantage of full-sky coverage and rapid slewing, enabling an optimized dark matter observation strategy focusing on the Galactic center. We also show that ground-based radio detectors such as GRAND can achieve high sensitivities and high duty cycles in radio quiet areas. We compare the sensitivities of next generation neutrino experiments with existing constraints from IceCube and updated 90% C.L. upper limits on <σv> and Γχ→νν¯ using results from the Pierre Auger Collaboration and ANITA. We show that in the range 10^7 ≤ mχ/GeV ≤ 10^11 POEMMA and GRAND10k will improve the neutrino sensitivity to particle dark matter by factors of 2 to 10 over existing limits, whereas GRAND200k will improve this sensitivity by two orders of magnitude. In the range 10^11 ≤ mχ/GeV ≤ 10^15 , POEMMA’s fluorescence observation mode will achieve an unprecedented sensitivity to dark matter properties. Finally, we highlight the importance of the uncertainties related to the dark matter distribution in the Galactic halo, using the latest fit and estimates of the Galactic parameters.
Neutrino constraints on long-lived heavy dark sector particle decays in the Earth
Search for High-Energy Neutrinos from Ultra-Luminous Infrared Galaxies with IceCube
Direction Reconstruction using a CNN for GeV-Scale Neutrinos in IceCube
A study of super-luminous stars with the Fermi Large Area Telescope
11:45 am, Friday, Jun 25th via Zoom
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with the passcode: 55688
The EMU view of the Large Magellanic Cloud: Troubles for sub-TeV WIMPs
Absorption from Primordial Black Holes as source of baryon asymmetry
Dy-159 electron-capture: a strong new candidate for neutrino mass determination
Probing Compensated Isocurvature with the 21-cm Signal during Cosmic Dawn
Juneteenth holiday: No APL on Jun 18th
Simple estimate of BBN sensitivity to light freeze-in dark matter
Extended search for supernova-like neutrinos in NOvA coincident with LIGO/Virgo detections
A Decade of Discoveries by the Daya Bay Reactor Neutrino Experiment
Remnant black hole kicks and implications for hierarchical mergers
11:45 am, Friday, Jun 11th via Zoom
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with the passcode: 130425
Inelastic Dark Matter at the Fermilab Short Baseline Neutrino Program
Impact of Improved Energy Resolution on DUNEsensitivity to Neutrino Non-Standard Interactions
Signatures of primordial black hole dark matterat DUNE and THEIA
Crust-core transition of a neutron star: effect of the temperatureunder strong magnetic fields
Probing Dark Matter and Fundamental Physics with the Cherenkov Telescope Array
11:45 am, Friday, Jun 4th via Zoom
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with the passcode: 55688
Guest: Ivan Martinez-Soler (Northwestern U)
Title: SN1987A still shining: A Quest for Pseudo-Dirac Neutrinos
Abstract:
Ever since the discovery of neutrinos, one question has daunted us, are neutrinos their own antiparticles? One remarkable possibility is that neutrinos have a pseudo-Dirac nature, truly Majorana neutrinos which behave, for all practical purposes, as Dirac fermions, only distinguishable by tiny mass-squared differences. Such mass differences would induce oscillations that could only be conspicuous over astrophysical baselines. We analyze the neutrino data from SN1987A in the light of these active sterile oscillations and find a mild preference (∆χ^2 ≈ 3) for a non-zero quadratic mass difference δm^2 = 6.31 × 10^(−20) eV^2 . Notably, the same data is able to exclude δm^2 ~ [2.55, 3.01] × 10^(−20) eV^2 with ∆χ^2 > 9, the tiniest mass differences constrained so far. We further consider the future sensitivity of next-generation experiments like the Deep Underground Neutrino Experiment (DUNE) and Hyper-Kamiokande (HK) and demonstrate that, for a future galactic SN occurring at 10 kpc, mass-squared differences as small as ~ 10^(−20) eV^2 could be explored.
On the relation between the astrophysical neutrino fluxes and the cosmic ray fluxes
Search for dark matter annihilation signals from unidentified Fermi-LAT objects with H.E.S.S.
Neutrino propagation in winds around the central engine of sGRB
Detection of LIGO-Virgo binary black holes in the pair-instability mass gap
11:45 am, Friday, May 28th via Zoom
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with the passcode: 379133
A Search for the 3.5 keV Line from the Milky Way's Dark Matter Halo with HaloSat
Gamma rays and neutrinos from RX J1713.7-3946 in a lepto-hadronic scenario
On the relation between the astrophysical neutrino fluxes and the cosmic ray fluxes
Do gamma-ray burst measurements provide a useful test of cosmological models?
11:45 am, Friday, May 21st via Zoom
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with the passcode: 562867
Guest: Daniele Teresi (CERN)
Primordial Black Holes from First-Order Cosmological Phase Transitions
First direct neutrino-mass measurement with sub-eV sensitivity
Ultrahigh-energy photons up to 1.4 petaelectronvolts from 12 γ-ray Galactic sources
Heavy Neutrino searches through Double-Bang Events atSuper-Kamiokande, DUNE, and Hyper-Kamiokande
Constraining active-sterile neutrino transitionmagnetic moments at DUNE near and far detectors
11:45 am, Friday, May 14th via Zoom
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with the passcode: 55688
European Spallation Source: a future for Coherent Neutrino Nucleus Scattering
New Thermal Relic Targets for Inelastic Vector-Portal Dark Matter
Searching for new physics through neutrino non-standard interactions
Probing ultra-light dark photon from inverse Compton-like scattering
Constraining Mach’s principle with high precision astrometry
11:45 am, Friday, May 7th via Zoom
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with the passcode: 841892
Guest: Bei Zhou (Johns Hopkins University)
Search for High-Energy Neutrino Emission from Radio-Bright AGN
Emission lines from X-ray illuminated accretion disc in black hole binaries
11:45 am, Friday, Apr 30 via Zoom
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with the passcode: 14212
Guest: Carlos Blanco (Stockholm U., OKC)
Title: Gamma-Rays from Star Forming Activity Appear to Outshine Misaligned Active Galactic Nuclei
Resurrecting Low-Mass Axion Dark Matter Via a Dynamical QCD Scale
Beyond freeze-in: Dark Matter via inverse phase transition and gravitational wave signal
Calculated event rates for Axion Detection via Atomic and Nuclear Processes
Dark matter implications of the KATRIN neutrino mass experiment
11:45 am, Friday, Apr 23rd via Zoom
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with the passcode: 634079
Limits on Sub-GeV Dark Matter from the PROSPECT Reactor Antineutrino Experiment
Constraining Primordial Black Holes Based on The Dynamics of Neptune
Constraints on axionic fuzzy dark matter from light bending and Shapiro time delay
Multi-messenger Implications of Sub-PeV Diffuse Galactic Gamma-Ray Emission
Radio Line Properties of Axion Dark Matter Conversion in Neutron Stars
11:45 am, Friday, Apr 16th not via Zoom
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with the passcode: 55688
Guest: Andrea Caputo (Weizmann Inst.)
Title: Searching for Sterile Neutrino with X-ray Intensity Mapping
Abstract:
The cosmological X-ray emission associated to the possible radiative decay of sterile neutrinos is composed by a collection of lines at different energies. For a given mass, each line corresponds to a given redshift. In this work, we cross correlate such line emission with catalogs of galaxies tracing the dark matter distribution at different redshifts. We derive observational prospects by correlating the X-ray sky that will be probed by the eROSITA and Athena missions with current and near future photometric and spectroscopic galaxy surveys. A relevant and unexplored fraction of the parameter space of sterile neutrinos can be probed by this technique.
Supernova fallback as origin of neutron star spins and spin-kick alignment
Stationary solutions for fast flavor oscillations of a homogeneous dense neutrino gas
Constraining Black Hole Spin Based on the Absence of Lense-Thirring Precession of Megamaser Clumps
11:45 am, Friday, Apr 9th not via Zoom
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with the passcode: 55688
Guest: Anders E. Thomsen (Bern U.)
Title: A Model of Muon Anomalies
Abstract:
The Standard Model (SM) is augmented with a U(1)B−3Lμgauge symmetry spontaneously brokenabove the TeV scale when an SM-singlet scalar condenses. Scalar leptoquarksS1(3)= (3,1(3),1/3)charged under U(1)B−3Lμmediate the intriguing effects observed in muon (g−2),RK(∗)andb→sμ+μ−, while generically evading all other phenomenological constraints. The fermionic sectoris minimally extended with three right-handed neutrinos, and a successful type-I seesaw mechanismis realized. Charged lepton flavor violation and proton decay—common predictions of leptoquarks—are postponed to the dimension-6 effective Lagrangian. Unavoidable radiative corrections in theHiggs mass and muon Yukawa favor leptoquark masses interesting for collider searches. The param-eters of the model are radiatively stable and can be evolved by the renormalization group to thePlanck scale without inconsistencies. Alternative models based on a U(1)Lμ−Lτgauge symmetryare proposed for comparison.
First Analysis of Jupiter in Gamma Rays and a New Search for Dark Matter
Leading hadronic contribution to the muon magnetic moment from lattice QCD
Implications of muon g-2 anomaly, Galactic Center GeV excess and AMS-02 anti-proton excess for NMSSM
Find the Gap: Black Hole Population Analysis with an Astrophysically Motivated Mass Function
11:45 am, Friday, April 1.5th not via Zoom
11:45 am, Friday, Mar 26th via Zoom
Guest: Timon Emken (Chalmers Uni)
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with the passcode: 295577
Search for High-Energy Neutrino Emission from Radio-Bright AGN
Looking for a vectorlike B quark at LHC using jet substructure
Configurational entropy of heavy-quark QCD exotica: engendering the nextgeneration
Axion Cloud Decay due to the Axion-photon Conversionwith Background Magnetic Fields
11:45 am, Friday, Mar 19th via Zoom
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with the passcode: 250931
Detection of GeV γ-Ray Emission from supernova remnant SNR G15.9-0.2 with Fermi-LAT
The neutrino emission from thermal processes in very massive stars in the local universe
HAWC observations of the acceleration of very-high-energy cosmic rays in the Cygnus Cocoon
X-ray emitting structures in the Vela SNR: ejecta anisotropies and progenitor stellar wind residuals
X-ray and GeV afterglows and sub-TeV emission of GRB 180720B
The morphology of the X-ray afterglows and of the jetted GeV emission in long GRBs
Constraining Ultra-light Axions with Galaxy Cluster Number Counts
The 511 keV Excess and Primordial Black Holes in our Solar System
11:45 am, Friday, Mar 12th via Zoom
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with the passcode: 12345
Guest: Yi-Kuan Chiang
Entropy production due to electroweak phase transition in the framework of two Higgs doublet model
Searching for Magnetic Monopoles with theEarth’s Magnetic Field
Probing CP Violation in PhotonSelf-Interactions with Cavities
Detection of a particle shower at the Glashow resonance with IceCube
11:45 am, Friday, Mar 5th via Zoom
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with the passcode: 31415
Guest: Xavier Rodrigues (DESY)
Title: AGN jets as the origin of UHECRs and perspectives for the detection of EeV astrophysical neutrinos
Abstract:
We demonstrate that a population of Active Galactic Nuclei (AGN) can describe the observed spectrum of ultra-high-energy cosmic rays (UHECRs) at and above the ankle, and that the dominant contribution comes from low-luminosity BL Lacs. Such an AGN-only scenario is in tension with UHECR composition observations above 10 EeV. However, a sub-dominant contribution from high-luminosity AGN reduces this tension and leads simultaneously to a substantial neutrino flux that peaks at EeV energies. The same emission also extends down to PeV energies, and is therefore constrained by current IceCube limits. We also show that the flux of neutrinos emitted from within the sources should outshine the cosmogenic neutrinos produced during the propagation of UHECRs. This result has profound implications for ultra-high-energy (∼EeV) neutrino experiments, since additional search strategies can be used for source neutrinos compared to cosmogenic neutrinos, such as stacking searches, flare analyses, and multi-messenger follow-ups.
The first evidence for three-dimensional spin-velocity alignment in pulsars
Prospects for kilonova signals in the gravitational-wave era
High Energy Neutrinos from Choked Gamma-Ray Bursts in AGN Accretion Disks
Reconstruction of the neutrino mass as a function of redshift
11:45 am, Friday, Feb 26th via Zoom
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with the passcode: 544989
Dissipative Dark Matter on FIRE: I. Structural and kinematic properties of dwarf galaxies
Supernova neutrino signals based on long-term axisymmetric simulations
Exploring dark sector parameters in light of neutron star temperatures
Exploring dark sector parameters in light of neutron star temperatures
Germanium response to sub-keV nuclear recoils: a multipronged experimental characterization
The phenomenology of nuclear scattering for a WIMP of arbitrary spin
Directional Detectability of Dark Matter With Single Phonon Excitations: Target Comparison
Axion search with quantum nondemolition detection of magnons
11:45 am, Friday, Feb 19th via Zoom
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with the passcode: 111111
Doubly hidden 0++molecules and tetraquarks states from QCD at NLO
Terrestrial Probes of Electromagnetically Interacting Dark Radiation
Constraining Light Dark Photons from GW190517 and GW190426152155
11:45 am, Friday, Feb 12th via Zoom
Guest: Payel Mukhopadhyay (Stanford U)
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with the passcode: 111111
Celestial-Body Focused Dark Matter Annihilation Throughout the Galaxy
Measuring solar neutrinos over Gigayear timescales with Paleo Detectors
Supernova Constraint on Self-Interacting Dark Sector Particles
Neutrino signal dependence on gamma-ray burst emission mechanism
Urca Cooling in Neutron Star Crusts and Oceans: Effects of Nuclear Excitations
DETECTING NEUTRINO MASS BY COMBINING MATTER CLUSTERING, HALOS, AND VOIDS
First demonstration of early warning gravitational wave alerts
What can be learned from a proto-neutron star’s mass and radius?
11:45 am, Friday, Feb 5th via Zoom
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with the passcode: 111111
Dynamical Pool-Size Optimization for the SARS-CoV-2 PCR Test
Measuring solar neutrinos over Gigayear timescales with Paleo Detectors
Connecting the Light Curves of Type IIP Supernovae to the Properties of their Progenitors
Dark matter from an even lighter QCD axion: trapped misalignment
Exploring the Origin of Supermassive Black Holes with Coherent Neutrino Scattering
Constraining axion-like particles using the white dwarf initial-final mass relation
Neutron Stars Harboring a Primordial Black Hole: Maximum Survival Time
Thermonuclear X-ray Bursts with late secondary peaks observed from 4U 1608-52
11:45 am, Friday, Jan 29nd via Zoom
Use this link to access the meeting: ZOOM
with the passcode: 00000
Resonant Scattering between Dark Matter and Baryons: Revised Direct Detection and CMB Limits
Long Range Interactions in Cosmology: Implications for Neutrinos
Dynamical Pool-Size Optimization for the SARS-CoV-2 PCR Test
11:45 am, Friday, Jan 22nd via Zoom
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with the passcode: 00000
Guest: Francesco Capozzi (Virginia Tech), Linda Xu (Harvard)
A Closer Look at CP-Violating Higgs Portal Dark Matter as a Candidate for the GCE
Long Range Interactions in Cosmology: Implications for Neutrinos
The Future of High-Energy Astrophysical Neutrino Flavor Measurements
Evidence that Ultra-High-Energy Gamma Rays are a Universal Feature Near Powerful Pulsars
Impact of Dark Photon Emission on Massive Star Evolution and Pre-Supernova Neutrino Signal
Discovery of an 8 MeV line in the SN 1987A neutrino spectrum
A Machine Learning approach for classification of accretion states of Black hole binaries
The final core collapse of pulsational pair instability supernovae
11:45 am, Friday, Jan 15th via Zoom
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with the passcode: 053289
Guest: Edoardo Vitagliano (UCLA)
Identification of a Local Sample of Gamma-Ray Bursts Consistent with a Magnetar Giant Flare Origin
Common envelope jets supernovae with a black hole companion as possible high energy neutrino sources
Analysis methods for the first KATRIN neutrino-mass measurement
Testing dark matter interactions with CMB spectral distortions
Search for Tens of MeV Neutrinos associated with Gamma-Ray Bursts in Super-Kamiokande
Probing Kilonova Ejecta Properties Using a Catalog of Short Gamma-Ray Burst Observations
Resonant Scattering between Dark Matter and Baryons: Revised Direct Detection and CMB Limits
2020
11:45 am, Friday, Jan 8th via Zoom
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with the passcode: 983520
Guest: Aneta Wojnar (Tartu University)
Color-octet scalars in Dirac gaugino models with broken R symmetry
MAGIC observations of the nearby short gamma-ray burst GRB 160821B
Bose-Einstein Condensation of pions in Proton-Proton collisions at the Large Hadron Collider
Telescope Array Bursts, Radio Pulses and Axion Quark Nuggets
11:45 am, Friday, Dec 18th via Zoom
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with the passcode: 352924
Guest: William Luszczak (University of Wisconsin)
Binary interactions enhance the Diffuse Supernova Neutrino Background
Nucleon Structure and Strong Interactions in Dark Matter Capture in Neutron Stars
Gravitational wave constraints on the primordial black hole dominated early universe
MAGIC observations of the nearby short gamma-ray burst GRB 160821B
The QCD Axion and Gravitational Waves in light of NANOGrav results
A Stringent Upper Limit on Dark Matter Self-Interaction Cross Section from Cluster Strong Lensing
Interpretation of XENON1T excess with MeV boosted dark matter
Detection of large-scale X-ray bubbles in the Milky Way halo
The POEMMA (Probe of Extreme Multi-Messenger Astrophysics) Observatory
11:45 am, Friday, Dec 11th via Zoom
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with the passcode: 12345
Guest: Yu-Dai Tsai (Fermilab)
First Observations of Solar Disk Gamma Rays over a Full Solar Cycle
Follow-up of astrophysical transients in real time with the IceCube Neutrino Observatory
Cosmic-ray antiprotons in the AMS-02 era:A sensitive probe of dark matter
Detecting the brightest HAWC sources with IceCubein the upcoming years
GW190426 152155: a merger of neutron star-black hole or low mass binary black holes?
11:45 am, Friday, Dec 4th via Zoom
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with the passcode: 12345
Universal profiles for radio searches of dark matter in dwarf galaxies
Gauge couplings evolution from the Standard Model, through Pati-Salam theory, into E8
Electroweak Restoration at the LHC and Beyond: The Vh Channel
Dark sector production and baryogenesisfrom not quite black holes
No Lunch on Friday, Nov 27th
Enjoy the Thanksgiving holiday : )
11:45 am, Friday, Nov 20th via Zoom
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with the passcode: 12345
Guest: Philip Lu (UCLA)
News Release: NSF begins planning for decommissioning of Arecibo Observatory’s 305-meter telescope due to safety concerns
Constraining Primordial Black Holes with Dwarf Galaxy Heating
Intimate Relationship Between Sterile Neutrino Dark Matter and ΔNeff
What determines the structure of short gamma-ray burst jets?
A Demonstration of Improved Constraints on Primordial Gravitational Waves with Delensing
Constraints on the properties of warm dark matter using the satellite galaxies of the Milky Way
Implications of recoil kicks for black hole mergers from LIGO/Virgo catalogs
High-energy neutrino astronomy and the Baikal-GVD neutrino telescope
11:45 am, Friday, Nov 13th via Zoom
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with the passcode: 12345
Guest: Pierluca Carenza (Bari U.)
Modeling in-ice radio propagation with parabolic equation methods
Intimate Relationship Between Sterile Neutrino Dark Matter and ∆N_eff
No Lunch on Friday, Nov 6th
Papers of interest:
New Pathways to the Relic Abundance of Vector-Portal Dark Matter
Astrophysical constraints on non-standard coherent neutrino-nucleus scattering
Non-thermal neutrinos created by shock acceleration in successful and failed core-collapse supernova
Excitation of gravitational wave modes by a center-of-mass velocity of the source
The Milky Way’s bar structural properties from gravitational waves
Gravitational-Wave Signatures from Compact Object Binaries in the Galactic Center
Pulsational pair-instability and the mass gap of Population III Black Holes: Effects of overshooting
Axion Searches with Two Superconducting Radio-frequency Cavities
How do I introduce Schrodinger equation during the quantum mechanics course?
11:45 am, Friday, Oct 30th via Zoom
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with the passcode: 515588
Guest: Chengchao Yuan (PSU)
Hunting for Dark Matter Subhalos in Strong Gravitational Lensing with Neural Networks
Anomaly Detection for Multivariate Time Series of Exotic Supernovae
On Dark Matter Explanations of the Gamma-Ray Excesses from the Galactic Center and M31
Non-thermal neutrinos created by shock acceleration in successful and failed core-collapse supernova
Probing cosmic-ray accelerated light dark matter with IceCube
Joint constraints on thermal relic dark matter from a selection of astrophysical probes
Reconciling EHT and Gas Dynamics Measurements in M87: Is the Jet Misaligned at Parsec Scales?
Seeding Supermassive Black Holes with Self-Interacting Dark Matter
Annihilating Dark Matter Search with 12 Years of Fermi LAT Data in Nearby Galaxy Clusters
A search for ultra high energy neutrinos from TXS 0506+056 using the Pierre Auger Observatory
11:45 am, Friday, Oct 23th via Zoom
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with the passcode: 12345
Guest: Jaryd Ulbricht from UCSC
Asymptotic analysis of the Boltzmann equation for dark matter relic abundance
Searches for new sources of CP violation using molecules as quantum sensors
Split Left-Right Symmetry and Scotogenic Quark and Lepton Masses
11:45 am, Friday, Oct 16th via Zoom
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with the passcode: 743046
Detecting Composite Dark Matter with Long Range and Contact Interactions in Gas Clouds
HAWC and Fermi-LAT Detection of Extended Emission from the Unidentified Source 2HWC J2006+341
Cosmic ray flux and lockdown due to COVID19 in Kolkata -- any correlation?
Production of axion-like particles from photon conversions in large-scale solar magnetic fields
The observation of the Crab Nebula with LHAASO-KM2A for the performance study
Constraints on MeV dark matter and primordial black holes: Inverse Compton signals at the SKA
Stringent Search for Precursor Emission in Short GRBs from Fermi/GBM data and Physical Implications
Direct Detection of Hawking Radiation from Asteroid-Mass Primordial Black Holes
New Constraints on the Mass of Fermionic Dark Matter from Dwarf Spheroidal Galaxies
11:45 am, Friday, Oct 9th via Zoom
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with the passcode: 489879
Universal gravitational-wave signatures from heavy new physics in the electroweak sector
An excess of small-scale gravitational lenses observed in galaxy clusters
Constraints on the Epoch of Dark Matter Formation from Milky Way Satellites
Relic Neutrino Degeneracies and Their Impact on Cosmological Parameters
Inference of neutrino flavor evolution through data assimilation and neural differential equations
Probing dark photons in the early universe with big bang nucleosynthesis
Gravitational Waves from Neutrino Asymmetries in Core-Collapse Supernovae
Impact of neutrino pair-production rates in Core-Collapse Supernovae
The Stellar Merger Scenario for Black Holes in the Pair-instability Gap
Inferring physical properties of stellar collapse by third-generation gravitational-wave detectors
11:45 am, Friday, Oct 2nd via Zoom
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with the passcode: 12345
Final state Sommerfeld effect on dark matter relic abundance
Effective Field Theory of Dark Matter Direct DetectionWith Collective Excitations
11:45 am, Friday, Sept 25th via Zoom
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with the passcode: 295833
This week, Professor Basudeb Dasgupta will give a talk about his recent paper, "Fast Flavor Depolarization of Supernova Neutrinos"
Formation of the cosmic-ray halo: Galactic spectrum of primary cosmic rays
Evidence of Cosmic-Ray Excess from Local Giant Molecular Clouds
A survey of active galaxies at TeV photon energies with the HAWC gamma-ray observatory
Observing the thermalization of dark matter in neutron stars
Searching for Gravitational Waves with Strongly Lensed Repeating Fast Radio Bursts
11:45 am, Friday, Sept 18th via Zoom
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with the passcode: 797537
Fundamental physics with the diffuse supernova background neutrinos
A gravitational-wave limit on the Chandrasekhar mass of dark matter
Using Gravitational Wave Parallax to Measure the Hubble Parameter with Pulsar Timing Arrays
Possible Signature of First-Order Phase Transition in the Multi-messenger Data of Neutron Stars
11:45 am, Friday, Sept 11th via Zoom
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with the passcode: 12345
Asymptotic analysis of the Boltzmann equation for dark matter relic abundance
Dark Fluxes from Accreting Black Holes and Direct Detections
11:45 am, Friday, Sept 4th via Zoom
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with the passcode: 731870
Properties and astrophysical implications of the 150 Msun binary black hole merger GW190521
The GW190521 Mass Gap Event and the Primordial Black Hole Scenario
GW190521: A Binary Black Hole Merger with a Total Mass of 150 M⊙
On the Detection Potential of Blazar Flares for Current Neutrino Telescopes
Constraining sub-eV Dark Matter from Direct Detection Experiment
All known Type Ia supernovae models fail to reproduce the observed t0−MNi56 correlation
Testing the ALP-photon coupling with polarization measurements of Sagittarius A*
Radio impulsive events in quiet solar corona and Axion Quark Nugget Dark Matter
Dark Matter Density Profiles in Dwarf Galaxies: Linking Jeans Modeling Systematics and Observation
Origin of the hardening in AMS-02 nuclei spectra at a few hundred GV
SM antideuteron background to indirect dark matter signals in galactic cosmic rays
11:45 am, Friday, August 28th via Zoom
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with the passcode: 43210
A search for solar axions and anomalous neutrino magnetic moment with thecomplete PandaX-II data
Constraints on General Light Mediators from PandaX-II Electron Recoil Data
New Experimental Constraints in a New Landscape for Composite Dark Matter
Diffractive production of Λ hyperonsin the high-energy limit of strong interactions
Earliest Resolution to the Neutrino Mass Ordering? (? in the title ;-)...)
Eliminating the LIGO bounds on primordial black hole dark matter
Elastic and Inelastic Scattering of Cosmic-Rays on Sub-GeV Dark Matter
11:45 am, Friday, August 21th via Zoom
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with the passcode: 43210
Ningqiang Song, a postdoc at Queen's University, will give a talk about his recent work in collaboration with Aaron Vincent on microscopic black holes at IceCube and FCC (https://arxiv.org/abs/1907.08628, https://arxiv.org/abs/1912.06656).
Fundamental physics with the diffuse supernova background neutrinos
A Statistical Analysis of the COHERENT Data and Applications to New Physics
A measurement of the cosmic-ray energy spectrum above 2.5×1018 eV using the Pierre Auger Observatory
Features of the energy spectrum of cosmic rays above 2.5×1018 eV using the Pierre Auger Observatory
Reconciling hints on axion-like-particles from high-energy gamma rays with stellar bounds
11:45 am, Friday, August 14th via Zoom
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with the passcode: 037402
Exciting Prospects for Detecting Late-Time Neutrinos from Core-Collapse Supernovae
Deciphering the Origin of the GeV--TeV Gamma-ray Emission from SS 433
Shedding New Light on Sterile Neutrinos from XENON1T Experiment
Prediction of Tunable Spin-Orbit Gapped Materials for Dark Matter Detection
Probing the Milky Way's Dark Matter Halo for the 3.5 keV Line
An early warning system for electromagnetic follow-up of gravitational-wave events
11:45 am, Friday, August 7th via Zoom
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with the passcode: 383587
Results of Dark Matter Search using the Full PandaX-II Exposure
Dark Energy Survey Year 1 Results: Constraining Baryonic Physics in the Universe
High-Energy Neutrinos and Gamma-Rays from Non-Relativistic Shock-Powered Transients
Prospects for Heavy WIMP Dark Matter with CTA: the Wino and Higgsino
Lyman-α Constraints on Cosmic Heating from Dark Matter Annihilation and Decay
Hint of a tension between Nuclear physics and Astrophysical observations
A Suggested Alternative to Dark Matter in Galaxies: I. Theoretical Considerations
A Search for Axionic Dark Matter Using the Magnetar PSR J1745-2900
11:45 am, Friday, July 24th via Zoom
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An Active-to-Sterile Neutrino Transition Dipole Moment and the XENON1T Excess
Is GW170817 a Multimessenger Neutron Star-Primordial Black Hole Merger?
Charm contribution to ultrahigh-energy neutrinos from newborn magnetars
Gravitational Waves from Neutrino Asymmetries in Core-Collapse Supernova
Back to (Mass-)Square(d) One: The Neutrino Mass Ordering in Light of Recent Data
11:45 am, Friday, July 17th via Zoom
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An Active-to-Sterile Neutrino Transition Dipole Moment and the XENON1T Excess
Is GW170817 a Multimessenger Neutron Star-Primordial Black Hole Merger?
What is the price of abandoning dark matter? Cosmological constraints on alternative gravity theories
String Fragmentation in Supercooled Confinementand implications for Dark Matter Cosmological constraints on alternative gravity theories
Dark Nucleosynthesis:Cross-sections and Astrophysical Signals Cosmological constraints on alternative gravity theories
Energy-Momentum portal to dark matter and emergent gravity Cosmological constraints on alternative gravity theories
An Attractive Scenario for Light Dark Matter Direct Detectionn
Relaxing Cosmological Neutrino Mass Bounds withUnstable Neutrinos
11:45 am, Friday, July 10th via Zoom
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Constraining the Charge-Sign and Rigidity-Dependence of Solar Modulation
GeV-scale neutrinos: interactions with mesons andDUNE sensitivity
11:45 am, Friday, July 3rd via Zoom
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Could the 2.6 M⊙ object in GW190814 be a primordial black hole?
Dark Matter Annihilation Can Produce a Detectable Antihelium Flux through Λb Decays
Exploring the robustness of stellar cooling constraints on light particles
Co-SIMP Miracle (V2, a new section on how our predictions can fit the XENON1T excess)
Telling Solar Neutrinos from Solar Axions When You Can't Shut Off the Sun
Updated MiniBooNE Neutrino Oscillation Results with Increased Data and New Background Studies
11:45 am, Friday, June 25th via Zoom
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Constraints on Sub-GeV Dark Matter-Electron Scattering from the DarkSide-50 Experiment
Recurrent Neutrino Emission from Supermassive Black Hole Mergers
Primordial Black Hole Dark Matter and the LIGO/Virgo observations
Muon g-2 and EDM experiments as muonic dark matter detectors
Does Matter Matter? Using the mass distribution to distinguish neutron stars and black holes
An incomplete list of recent papers on the XENON1T electron recoil excess:
Collider Constraints on a Dark Matter Interpretation of the XENON1T Excess
Can nonstandard neutrino interactions explain the XENON1T spectral excess?
New limits on dark photons from solar emission and keV scale dark matter
Hidden Photon Dark Matter in the Light of XENON1T and Stellar Cooling
Inelastic Dark Matter Electron Scattering and the XENON1T Excess
XENON1T Anomaly and its Implication for Decaying Warm Dark Matter
Prospects of Migdal Effect in the Explanation of XENON1T Electron Recoil Excess
11:45 am, Friday, June 19th via Zoom
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BBN constraints on universally-coupled ultralight scalar dark matter
Searching for Dark Matter Signals in Timing Spectra at Neutrino Experiments
New production channels for light dark matter in hadronic showers
11:45 am, Friday, June 12th via Zoom
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BBN constraints on universally-coupled ultralight scalar dark matter
Solar Neutrino Detection Sensitivity in DARWIN via Electron Scattering
The anomalous magnetic moment of the muon in the Standard Model
11:45 am, Friday, June 5th via Zoom
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Detectability of Axion Dark Matter with Phonon Polaritons and Magnons
HAWC J2227+610 and its association with G106.3+2.7, a new potential Galactic PeVatron
Direct limits on the interaction of antiprotons with axion-like dark matter
MAGIC observations of the diffuse γ-ray emission in the vicinity of the Galactic Centre
Detection of gravitational-wave signals from binary neutron star mergers using machine learning
11:45 am, Friday, May 29th via Zoom
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Light and Darkness: consistently coupling darkmatter to photons via effective operators
Constraints on light dark matter particles using white dwarf stars
Light Dark Matter in a minimal extension with two additional real singlets
11:45 am, Friday, May 22nd via Zoom
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Millisecond Pulsars Modify the Radio-SFR Correlation in Quiescent Galaxies
Probing Energetic Light Dark Matter with Multi-Particle Tracks Signatures at DUNE
Dark matter searches by the planned gamma-ray telescope GAMMA-400
Constraining sterile neutrinos by core-collapse supernovae with multiple detectors
11:45 am, Friday, May 15th via Zoom
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Primordial Black Holes Confront LIGO/Virgo data: Current situation
Searching for Sub-GeV Dark Matter in the Galactic Centre using Hyper-Kamiokande
A high-energy neutrino coincident with a tidal disruption event
Implications of a "Fast Radio Burst" from a Galactic Magnetar
Fast Radio Bursts from reconnection events in magnetar magnetospheres
VERITAS Discovery of VHE Emission from the Radio Galaxy 3C 264: A Multi-Wavelength Study
Origin of Sterile Neutrino Dark Matter via Vector Secret Neutrino Interactions
Dark Matter Detection Capabilities of a Large Multipurpose Liquid Argon Time Projection Chamber
Dark matter or correlated errors? Systematics of the AMS-02 antiproton excess
11:45 am, Friday, May 8th via Zoom
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Revisiting longitudinal plasmon-axion conversion in external magnetic fields
Searching for Sub-GeV Dark Matter in the Galactic Centre using Hyper-Kamiokande
Freeze-in Dark Matter from a Minimal B-L Model and Possible Grand Unification
11:45 am, Friday, May 1st via Zoom
Complete predictions for high-energy neutrino propagation in matter
Lifting the core-collapse supernova bounds on keV-mass sterile neutrinos
SENSEI: Direct-Detection Results on sub-GeV Dark Matter from a New Skipper-CCD
Gamma-Ray Absorption from The Cosmic Lyman Continuum Background
Supermassive black holes as possible sources of ultra high energy cosmic rays
Effects of Different Cosmic Ray Transport Models on Galaxy Formation
11:45 am, Friday, April 24th via Zoom
Further studies on the physics potential of an experiment using LHC neutrinos
Gravitational waves from the fragmentation of axion-like particle dark matter
Constraints on the coupling with photons of heavy axion-like-particles from Globular Clusters
Late-time decaying dark matter: constraints and implications for the H0-tension
Development of a Negative Ion Micro TPC Detector with SF6 Gas for the Directional Dark Matter Search
Probing the magnetic field in the GW170817 outflow using H.E.S.S. observations
11:45 am, Friday, April 17th via Zoom
On arrival time difference between lensed gravitational waves and light
Complete predictions for high-energy neutrino propagation in matter
Dark Matter Freeze Out during an Early Cosmological Period of QCD Confinement
Complete predictions for high-energy neutrino propagation in matter
Possibility of bottom-catalyzed matter genesis near to primordial QGP hadronization
11:45 pm, Friday, April 10th via Zoom
Current status and muon g−2 explanation of lepton portal dark matter
The search for anisotropy in the gravitational-wave background with pulsar-timing arrays
The Bardeen-Petterson effect in accreting supermassive black-hole binaries: a systematic approach
On arrival time difference between lensed gravitational waves and light
Could the Hubble Tension be Pointing Towards the Neutrino Mass Mechanism?
First Measurement of Electron Neutrino Scattering Cross Section on Argon
Hard X-ray properties of radio-selected blazars
A very useful website about COVID-19: coronavirus.1point3acres.com (if you don't know it yet)
12:30 pm, Friday, April 3rd via Zoom
Dark Photon Dark Matter in the Presence of Inhomogeneous Structure
MeV-scale reheating temperature and cosmological production of light sterile neutrinos
Spectrum of scalar and pseudoscalar glueballs from functional methods
DAMPE proton spectrum indicates a slow-diffusion zone in the nearby ISM
12:30 pm, Friday, Mar 27th via Zoom
An Effective Field Theory Analysis of the First LUX Dark Matter Search
A search for prompt gamma-ray counterparts to fast radio bursts in the Insight-HXMT data
Effective photon mass and (dark) photon conversion in the inhomogeneous Universe
Gravitational Wave Production right after Primordial Black Hole Evaporation
The heavier the better: how to constrain mass ratios and spins of high-mass neutron-star mergers
Strong constraints on thermal relic dark matter from Fermi-LAT observations of the Galactic Center
12:30 pm, Friday, Feb 28st in PRB M2005 (Price Place)
GW170817 and GW190425 as Hybrid Stars of Dark and Nuclear Matters
Cosmogenic neutrino fluxes under the effect of active-sterile secret interactions
Orbital evidences for dark-matter free Milky-Way dwarf-spheroidal galaxies
Discovery of a Giant Radio Fossil in the Ophiuchus Galaxy Cluster
12:30 pm, Friday, Feb 21st in PRB M2005 (Price Place)
Cosmology and prospects for sub-MeV dark matter in electron recoil experiments
A Cross-Correlation Study of High-energy Neutrinos and Tracers of Large-Scale Structure
Cosmic-ray anisotropies in right ascension measured by the Pierre Auger Observatory
A Dark Matter Interpretation of Excesses in Multiple Direct Detection Experiments
New Constraints on the Origin of Medium-Energy Neutrinos Observed by IceCube
Boltzmann hierarchies for self-interacting warm dark matter scenarios
12:30 pm, Friday, Feb 14th in PRB M2005 (Price Place)
Simulating the Cosmic Neutrino Background using Collisionless Hydrodynamics
Electromagnetic counterparts to gravitational wave events from Gaia
A New Approach to Mass and Radius of Neutron Stars with Supernova Neutrinos
Gravitational-wave captures by intermediate-mass black holes in galactic nuclei
Detection of very-high-energy γ-ray emission from the colliding wind binary η Car with H.E.S.S
Signature of neutrino mass hierarchy in gravitational lensing
First Results on Dark Matter Substructure from Astrometric Weak Lensing
12:30 pm, Friday, Feb 7th in PRB M2005 (Price Place)
Anti-Deuterons and Anti-Helium Nuclei from Annihilating Dark Matter
Probing new neutral gauge bosons with CEνNS and neutrino-electron scattering
Probing alternative cosmologies through the inverse distance ladder
12:30 pm, Friday, Jan 31th in PRB M2005 (Price Place)
Special Talk!
Heidi will give a practice talk for her faculty job search.
Title: Probing Cosmic Acceleration with Galaxy Clusters
Abstract: The accelerated expansion of the Universe is one of the biggest puzzles in physics. Why is gravity repulsive rather than attractive on distance scales larger than a few million lightyears? Galaxy clusters — the largest gravitationally bound objects in the Universe — can help us understand cosmic acceleration. Since faster cosmic acceleration would slow down the formation of galaxy clusters, we can observe galaxy clusters at different cosmic time to infer the history of cosmic acceleration. In this talk, I will start with a brief introduction to our current understanding of the Universe. I will then talk about how we use sky surveys of galaxy clusters to measure cosmic acceleration, and how we calibrate cluster masses precisely to achieve this goal. I will discuss several ambitious ground- and space-missions.
Anti-Deuterons and Anti-Helium Nuclei from Annihilating Dark Matter
Implications of Milky Way Substructures for the Nature of Dark Matter
Impact of uncertainties in the halo velocity profile on direct detection of sub-GeV dark matter
12:30 pm, Friday, Jan 24th in PRB M2005 (Price Place)
Probing compact dark matter with gravitational wave fringes detected by the Einstein Telescope
Is GW190425 consistent with being a neutron star−black hole merger?
Oscillation tomography of the Earth with solar neutrinos and future experiments
Extracting high-level information from gamma-ray burst supernova spectra
The contribution of nearby supernova remnants on the cosmic ray flux at Earth
Search for multi-messenger signals in NOvA coincident with LIGO/Virgo detections
Axion Stars Nucleation in Dark Mini-Halos around Primordial Black Holes
Primordial black holes as dark matter and gravitational waves from single-field polynomial inflation
12:30 pm, Friday, Jan 17th in PRB M2005 (Price Place)