2015

11:30 am, Friday, Dec 18th at PRB M2005 (Price Place)

1. Search for new physics in high mass diphoton events in proton-proton collisions at 13TeV

2. Search for resonances decaying to photon pairs in 3.2 fb−1 of pp collisions at s√ = 13 TeV with the ATLAS detector

3. Resonant Sterile Neutrino Dark Matter in the Local and High-z Universe

4. Properties of Resonantly Produced Sterile Neutrino Dark Matter Subhalos

5. The inner structure of dwarf sized halos in Warm and Cold Dark Matter cosmologies

6. Prospects for detection of target-dependent annual modulation in direct dark matter searches

7. Improved WIMP scattering limits from the LUX experiment

8. A practical theorem on using interferometry to measure the global 21-cm signal

9. The Gamma-Ray Luminosity Function of Millisecond Pulsars and Implications for the GeV Excess

10. Ultra-high-energy-cosmic-ray hot spots from tidal disruption events

11:30 am, Friday, Dec 11th at PRB M2005 (Price Place)

1. Measurement of muon anti-neutrino oscillations with an accelerator-produced off-axis beam

2. The Impact of Interpixel Capacitance on WFIRST PSFs

3. Inspecting the supernova gamma-ray burst connection with high-energy neutrinos

4. Lyman-alpha Forests cool Warm Dark Matter

5. The Spatial Morphology of the Secondary Emission in the Galactic Center Gamma-Ray Excess

6. Lower Bound on the Cosmic TeV Gamma-ray Background Radiation

7. Deep XMM Observations of Draco rule out a dark matter decay origin for the 3.5 keV line

8. Binary pulsars as dark-matter probes

9. Neutrino-Induced Nucleosynthesis in Helium Shells of Early Core-Collapse Supernovae

10. Detection of thermal neutrons with the PRISMA-YBJ array in Extensive Air Showers selected by the ARGO-YBJ experiment

11:30 am, Friday, Dec 4th at PRB M2005 (Price Place)

1. Model-Independent Indirect Detection Constraints on Hidden Sector Dark Matter

2. Wavelet-Based Techniques for the Gamma-Ray Sky

3. Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array

4. NIHAO V: Too big doesn't fail -- reconciling the conflict between LCDM predictions and the circular velocities of nearby field galaxies

5. An assessment of the "too big to fail" problem for field dwarf galaxies in view of baryonic feedback effects

6. The Effects of Dark Matter Annihilation on Cosmic Reionization

7. Prospects for dark matter detection with inelastic transitions of xenon

8. A search for cosmogenic production of β-neutron emitting radionuclides in water

9. IceCube Constraints on Fast-Spinning Pulsars as High-Energy Neutrino Sources

10. Search of MeV-GeV counterparts of TeV sources with AGILE in pointing mode

11:30 am, Friday, Nov 27th at PRB M2005 (Price Place)

1. Cross-Correlation of the Extragalactic Gamma-ray Background with Luminous Red Galaxies

2. Ultra High Energy Neutrinos from Gamma-Ray Burst Afterglows Using the Swift-UVOT Data

3. Non-Standard Interactions in propagation at the Deep Underground Neutrino Experiment

4. The Energy Spectrum of Cosmic Rays above 1017.2 eV Measured by the Fluorescence Detectors of the Telescope Array Experiment in Seven Years

5. Electron-positron pair production near the Galactic Centre and the 511 keV emission line

6. The CTA aims at the Inert Doublet Model

7. Why is High Energy Physics Lorentz Invariant?

11:30 am, Friday, Nov 20th at PRB M2005 (Price Place)

Special Seminar

Time: 11:30- 12:00

Speaker: Peter Denton (Vanderbilt)

Title:Cosmic Ray Anisotropy with Partial Sky Exposure

Abstract: UHECRs are the highest energy particles in the universe, yet very little is known about them. Their composition, sources, acceleration, and propagation details are all wholly unknown. The first step to addressing this problem is determining the sources, which requires measuring an anisotropy. Above $E\sim55$ EeV, anisotropies are expected to appear due to the GZK horizon, yet no definitive signal has been seen. Here I overview the current experimental status and present a discussion of anisotropy reconstruction techniques, along with their strengths and weaknesses. I use spherical harmonics as a general tool to detect large scale anisotropies in a low statistics environment. I compare the benefits of a full sky experiment such as JEM-EUSO to ground based partial sky experiments such as the Pierre Auger Observatory and Telescope Array. I show that while Auger can reconstruct a quadrupole without a partial sky penalty, partial sky exposure generally leads to a loss of precision beyond that just from lower statistics compared to a full sky experiment.

1. Fermi-LAT Observations of High-Energy Gamma-Ray Emission Toward the Galactic Center

2. On TeV Gamma Rays and the Search for Galactic Neutrinos

3. Atmospheric Neutrino Oscillations for Earth Tomography

4. Non-standard Neutrino Interactions at DUNE

5. Identification of nuclear effects in neutrino-carbon interactions at low three-momentum transfer

6. Observation of Energy and Baseline Dependent Reactor Antineutrino Disappearance in the RENO Experiment

7. Direct dark matter search by annual modulation in XMASS-I

8. Origin of the Proton-to-Helium Ratio Anomaly in Cosmic Rays

11:30 am, Friday, Nov 13th at PRB M2005 (Price Place)

1. Problems and Prospects from a Flood of Extragalactic TeV Neutrinos in IceCube

2. First combined search for neutrino point-sources in the Southern Hemisphere with the ANTARES and IceCube neutrino telescopes

3. Flaring of tidally compressed dark-matter clumps

4. Presupernova neutrinos: realistic emissivities from stellar evolution

5. Fermi-LAT Observations of High-Energy Gamma-Ray Emission Toward the Galactic Center

6. Sensitivity to oscillation with a sterile fourth generation neutrino from ultra-low threshold neutrino-nucleus coherent scattering

7. The IceCube Neutrino Observatory, the Pierre Auger Observatory and the Telescope Array: Joint Contribution to the 34th International Cosmic Ray Conference (ICRC 2015)

8. Pierre Auger Observatory and Telescope Array: Joint Contributions to the 34th International Cosmic Ray Conference (ICRC 2015)

11:30 am, Friday, Nov 6th at PRB M2005 (Price Place)

Special Seminar

Time: 11:30- 12:00

Speaker: Tathagata Ghosh (TAMU)

Title: Limits on cascade annihilation models and decaying dark matter lifetime from dwarf galaxies using Fermi-LAT

Abstract: Dwarf spheroidal galaxies are promising targets for the indirect detection of dark matter through gamma-ray emission due to their proximity, lack of astrophysical backgrounds and high dark matter density. They are often used to place restrictive bounds on the dark matter annihilation cross section. Many particle dark matter models predict that the dark matter undergoes cascade annihilations, i.e. the annihilation products are 4-body final states. In the context of model-independent cascade annihilation models, we review the compatibility of the dark matter interpretation of the Fermi-LAT Galactic center gamma-ray emission with null detections from dwarf spheroidal galaxies using six years of Fermi-LAT data. In addition, we present the analysis of data from 20 Dwarf Spheroidal galaxies and derivation from a stacked analysis, robust 95% confidence level upper limits on the dark matter lifetime for several decay channels and dark matter masses between 10 GeV and 10 TeV.

1. A Tale of Two Pulsars and the Origin of TeV Gamma Rays from the Galactic Center

2. Gamma Rays, Electrons, Hard X-Rays, and the Central Parsec of the Milky Way

3. Searches for Relativistic Magnetic Monopoles in IceCube

4. The Absolute Rate of LGRB Formation

5. The Relative Rate of LGRB Formation as a Function of Metallicity

6. Evidence against star-forming galaxies as the dominant source of IceCube neutrinos

7. Resolving the Extragalactic γ-ray Background above 50 GeV with Fermi-LAT

8. Search for Gamma-Ray Lines towards Galaxy Clusters with the Fermi-LAT

9. Neutron capture and the antineutrino yield from nuclear reactors

10. Measurement of θ13 in Double Chooz using neutron captures on hydrogen with novel background rejection techniques

11. Global Constraints on a Heavy Neutrino

12. The origin of IceCube's neutrinos: Cosmic ray accelerators embedded in star forming calorimeters

13. A Predictive Analytic Model for the Solar Modulation of Cosmic Rays

11:30 am, Friday, Oct 30th at PRB M2005 (Price Place)

Special Seminar

Time: 11:30- 12:00

Speaker: Gregory Dooley (MIT)

Title: The effect of Self-Interacting Dark Matter on tidal stripping in satellite galaxies and the galactic halo

Abstract: Observations of low surface brightness galaxies, low mass spiral galaxies, and Miky Way dwarf

spheroidals indicate that the central density of galaxies is lower than predicted in pure CDM simulations.

Self-interacting dark matter offers one possible explanation to the formation of low density cores in galactic

halos. Particles are allowed to elastically scatter, and in the higher density central regions of galaxies, an

increased scattering rate tends to drive out mass, transforming cusps into cores. Motivated by the lower

binding energy of cores vs. cusps, we investigate the effect that SIDM has on the tidal stripping of mass

in satellite galaxies around a Milky Way analog. Using n-body, dark matter only simulations of four different

models of SIDM, two of constant cross section and two with a velocity-dependent cross section, we

demonstrate that while the stripping of total bound dark matter mass is not significantly affected by permitted

SIDM models, the the stellar mass loss rate is appreciably increased. This implies a depression in the

satellite luminosity function in halos that pass within 50 kpc of their host. I will also present results that

differentiate the models which need further investigation.

1. Dark Matter Search Results from the PICO-60 CF3I Bubble Chamber

2. Spectral analysis of Fermi-LAT blazars above 50 GeV

3. Implication of the proton-deuteron radiative capture for Big Bang Nucleosynthesis

4. Gamma-ray emitting supernova remnants as the origin of Galactic cosmic rays?

5. Production Regimes for Self-Interacting Dark Matter

6. Measurements of the atmospheric neutrino flux by Super-Kamiokande: energy spectra, geomagnetic effects, and solar modulation

11:30 am, Friday, Oct 23rd at PRB M2005 (Price Place)

1. Putting Things Back Where They Belong: Tracing Cosmic-Ray Injection with H2

2. Dark Matter Searches for Monoenergetic Neutrinos Arising from Stopped Meson Decay in the Sun

3. Constraints on the Intergalactic Magnetic Field with Gamma-Ray Observations of Blazars

4. Blazar origin of some IceCube events

5. Sterile neutrinos in the light of IceCube

6. Cosmological constraints to dark matter with two- and many-body decays

7. Double pulses and cascades above 2 PeV in IceCube

8. A Bright Gamma-ray Galactic Center Excess and Dark Dwarfs: Strong Tension for Dark Matter Annihilation Despite Milky Way Halo Profile and Diffuse Emission Uncertainties

11:30 am, Friday, Oct 16th at PRB M2005 (Price Place)

1. Leading QCD Corrections for Indirect Dark Matter Searches: a Fresh Look

2. Explaining TeV Cosmic-Ray Anisotropies with Non-Diffusive Cosmic-Ray Propagation

3. Constraints on the Intergalactic Magnetic Field with Gamma-Ray Observations of Blazars

4. Shocks in the Early Universe

5. Big Bang Nucleosynthesis and the Helium Isotope Ratio

6. Solar neutrino detection in a large volume double-phase liquid argon experiment

7. Full-Sky Analysis of Cosmic-Ray Anisotropy with IceCube and HAWC

8. High energy cosmic ray self-confinement close to extragalactic sources

11:30 am, Friday, Oct 9th at PRB M2005 (Price Place)

Special Seminar 1

Speaker: Basudeb Dasgupta ( Tata Institute of Fundamental Research )

Title: Neutrino Flavor Conversion at Very High Density

Abstract:

We show that the flavor content of a dense gas of neutrinos is

unstable to small oscillations in time. The tendency is to equilibrate

the fluxes and and spectra of all flavors. We argue that this can

happen at very high neutrino and matter densities, i.e., deeper

in a supernova than previously realized, and may have profound

consequences for core-collapse supernovae.

Special Seminar 2

Speaker: Rebecca Leane ( University of Melbourne )

Title: Dark Matter at the LHC

Abstract:

In this talk I consider several issues faced by WIMP dark matter searches.

Firstly, I discuss the popular use of effective field theories (EFTs) to quantify

LHC bounds on dark matter, and show that some EFT operators considered

do not respect the weak gauge symmetries of the standard model. These

operators break down at the electroweak scale, rather than the energy scale

of new physics, and are invalid at LHC energies. I consider the circumstances

in which such operators can arise, use the mono-W process to illustrate

potential issues in their interpretation and application, and discuss the

phenomenology of a UV complete model that avoids such difficulties. In addition,

as the WIMP parameter space is becoming increasingly constrained, I discuss

the phenomenology of a simple leptophilic dark matter model, where the absence

of tree-level dark matter couplings to quarks can relax the strong limits placed

by hadron based experiments.

11:30 am, Friday, Oct 2nd at PRB M2005 (Price Place)

1. Cosmological Hints of Modified Gravity ?

2. Dark Photons from the Center of the Earth: Smoking-Gun Signals of Dark Matter

3. Searching for Standard Model Adjoint Scalars with Diboson Resonance Signatures

4. First measurement of radioactive isotope production through cosmic-ray muon spallation in Super-Kamiokande IV

5. Colloquium: The neutron lifetime

11:30 am, Friday, Sept 25th at PRB M2005 (Price Place)

Special Seminar

Time: 11:30- 12:00

Speaker: Prof. Jure Zupan (University of Cincinnati)

Title: Some thoughts on Higgs portal to dark matter

Abstract: In the talk I will cover two aspects of Higgs portal dark

matter: the effect of non-standard Higgs Yukawa couplings, and

the searches for the mediators that need to be present in the

case of fermionic dark matter.

Papers of interests this week:

1. Evidence for the Galactic contribution to the IceCube astrophysical neutrino flux

2. Dark matter implications of the WMAP-Planck Haze

3. Search for Transient Astrophysical Neutrino Emission with IceCube-DeepCore

4. Search for TeV Gamma-Ray Emission from Point-like Sources in the Inner Galactic Plane with a Partial Configuration of the HAWC Observatory

5. Search for Astrophysical Tau Neutrinos in Three Years of IceCube Data

6. Search for anisotropies in cosmic-ray positrons detected by the PAMELA experiment

7. Dark photons from charm mesons at LHCb

8. A deep view of the Large Magellanic Cloud with 6 years of Fermi-LAT observations

9. The distribution function of the Galaxy's dark halo

10. The Rate of Core Collapse Supernovae to Redshift 2.5 From The CANDELS and CLASH Supernova Surveys

11:30 am, Friday, Sept 18th at PRB M2005 (Price Place)

Special Seminar

Time: 11:30- 12:00

Speaker: Joshua Yao-Yu Lin (National Taiwan University)

Title: Impact of Gravitational Slingshot of Dark Matter on Galactic Halo Profiles

Abstract:

We study the impact of gravitational slingshot effect from massive astrophysical

objects (e.g. stars, black holes) on the distribution of cold dark matter in Milky Way

sized galaxies and dwarf galaxies. Multiple gravitational encounters of a lower mass

dark matter particle with massive astrophysical bodies would lead to an average

energy gain for the dark matter, similar to second order Fermi acceleration.

We calculate the average energy gain and model the integrated effect on the dark matter profile.

We find that such slingshot effect due to the intermediate mass black holes in

dwarf galaxies were significant in certain cases, which changes the dark matter distribution

at the galactic center and several alleviate small scale problems of cold dark matter.

Papers of interests this week:

1. Tomographic Constraints on High-Energy Neutrinos of Hadronuclear Origin

2. Toward the full test of the nuMSM sterile neutrino dark matter model with Athena

3. Evidence for the Galactic contribution to the IceCube astrophysical neutrino flux

4. Revisiting Big-Bang Nucleosynthesis Constraints on Dark-Matter Annihilation

5. Experimental Probes of Radio Wave Propagation near Dielectric Boundaries and Implications for Neutrino Detection

6. Continuum-Mediated Dark Matter-Baryon Scattering

11:30 am, Friday, Sept 11th at PRB M2005 (Price Place)

Special Seminar

Time: 11:30- 12:00

Speaker: Debtosh Chowdhury (INFN)

Title: Dark Matter Annihilation to Fermions and a Photon

Abstract:

We know from recent analyses that the inclusion of electroweak corrections can alter significantly

the energy spectra of Standard Model particles originated from dark matter annihilations. We are

interested in the process where radiation of photon has a significant contribution, in particular,

where Majorana dark matter particle annihilate into a pair of light fermion. This process is helicity suppressed.

The inclusion of photon radiation removes the p-wave suppression. We study this effect in detail using

effective operators responsible for this process. We put bound on the effective operators considered from

indirect dark matter searches and compare them with the bounds obtained from the direct and collider searches.

Papers of interests this week:

1. Known Radio Pulsars Do Not Contribute to the Galactic Center Gamma-Ray Excess

2. Results on light dark matter particles with a low-threshold CRESST-II detector

3. Dark matter annihilation radiation in hydrodynamic simulations of Milky Way haloes

4. Simulated Milky Way analogues: implications for dark matter indirect searches

5. Tomographic Constraints on High-Energy Neutrinos of Hadronuclear Origin

6. WIMP-Search Results from the Second CDMSlite Run

7. Measurement of Muon Annual Modulation and Muon-Induced Phosphorescence in NaI(Tl) Crystals with DM-Ice17

8. Toward the full test of the nuMSM sterile neutrino dark matter model with Athena

11:30 am, Friday, Sept 4th at PRB M2005 (Price Place)

1. Dark Matter Halos as Particle Colliders: A Unified Solution to Small-Scale Structure Puzzles from Dwarfs to Clusters

2. Tagging Spallation Backgrounds with Showers in Water-Cherenkov Detectors

3. Indirect Detection Constraints on the Model Space of Dark Matter Effective Theories

4. Sensitivity to Z-prime and non-standard neutrino interactions from ultra-low threshold neutrino-nucleus coherent scattering

5. Modulation Effects in Dark Matter-Electron Scattering Experiments

6. Non-thermal cosmic neutrino background

7. Hidden Cosmic-Ray Accelerators as an Origin of TeV-PeV Cosmic Neutrinos