Publications
As of October 31, 2022, I have 741 publications as an author within the CMS collaboration and 348 publications as an author within the ATLAS collaboration. For most of the published physics papers from the ATLAS collaboration, my contribution has been through operations and monitoring of the ATLAS muon detector. For the CMS collaboration, my contributions are through the operation and monitoring of the CMS pixel detector, commissioning of the hadron calorimeter, and delivering the latest and greatest tau identification algorithms to the collaboration.
For a full list of publications, please see https://inspirehep.net/authors/1071090. The following list are a subset of CMS and ATLAS results which I have made a dedicated effort to produce, either as a principal contributor or as a coordinator. For each of them, I put a brief description to highlight my contribution.
The author list can be obtained from the hyperlink of each publication.
A. Detector commissioning, operation
[A1] The CMS Phase-1 Pixel Detector Upgrade
The Tracker Group of the CMS Collaboration
arXiv:2012.14304 (2020)
Demonstrated the weakness of the data acquisition system of the pixel detector when there are consecutive events happening very close in time. This observation helped shape the firmware development.
[A2] The DAQ and control system for the CMS Phase-1 pixel detector upgrade
The CMS collaboration
Same as [A1].
[A3] Commissioning of the ATLAS Muon Spectrometer with cosmic rays
The ATLAS collaboration
Served as co-editor (Section 6.3). Special contribution to the commissioning of the endcap muon trigger detector (Thin Gap Chamber), and its detection efficiency measurements using cosmic ray muons.
B. Particle identification
[B1] Identification of hadronic tau lepton decays using a deep neural network
The CMS collaboration
Led the calibration of the identification efficiencies.
[B2] Jet Substructure at the Large Hadron Collider: Experimental Review
Roman Kogler, Benjamin Nachman, Alexander Schmidt, Lily Asquith, Mario Campanelli, Chris Delitzsch, Philip Harris, Andreas Hinzmann, Deepak Kar, Christine McLean, Justin Pilot, Y. Takahashi, Nhan Tran, Caterina Vernieri, Marcel Vos, and Emma Winkelsd
Rev. Mod. Phys. 91 (2019) 45003, arXiv:1803.06991
Served as co-editor. Developed next-generation quark-gluon discriminator by utilizing machine learning techniques, leading to a better background reduction by up to 10%, as compared to the existing method.
[B3] Performance of reconstruction and identification of leptons decaying to hadrons and in pp collisions at s = 13 TeV
The CMS collaboration
Served as co-editor. Established new identification algorithm capable of selecting genuine hadronically decaying lepton with more than 30% higher efficiency compared to the previous method. The algorithm is now widely used among the CMS collaboration.
C. Physics analyses
[C1] The search for a third-generation leptoquark coupling to a lepton and a b quark through single, pair and nonresonant production at 13 TeV
The CMS collaboration
CMS-PAS-EXO-19-016 (2022)
Brought up a new analysis idea to search for nonresonant production of the leptoquark. Together with pair and single production searches, we delivered the world’s best limit to date on the leptoquark with a 3σ excess found in the nonresonant signals.
[C2] Observation of lepton pair production in ultra peripheral lead-lead collisions at sNN = 5.02 TeV
The CMS collaboration
arXiv:2206.05192 (2022)
Brought up a new analysis idea. By making use of the low momentum tau reconstruction algorithm that I developed, we succeeded to measure tau g-2 for the first time at the hadron collider experiment.
[C3] Search for a low-mass resonance in association with a bottom quark in proton-proton collisions at s = 13 TeV
The CMS collaboration
Served as main editor. Led the analysis from the beginning to the end. This analysis excluded potential new physics scenarios that predict a low-mass, Higgs-boson-like particle that is beyond the standard model and decays into a pair of leptons.
[C4] Beyond the Standard Model Physics at the HL-LHC and HE-LHC
The CMS Collaboration
arXiv:1812.07831 (2018), CMS-PAS-FTR-18-028
Performed future projection studies of the third-generation leptoquark searches
[C5] Observation of the Higgs boson decay to a pair of leptons with the CMS detector
The CMS Collaboration
Served as co-editor. Not only the analysis itself but also contributed to the Monte-Carlo generation, and the development of the identification algorithm.
[C6] Search for singly produced third-generation leptoquarks decaying to a lepton and a b quark in proton-proton collisions at 13 TeV
The CMS collaboration
Served as main editor. Brought up a new analysis idea, inspired by recent B-physics anomalies, to search for singly produced leptoquark. Delivered the world’s best upper limit to date on the leptoquark mass in its large coupling scenario.
[C7] Search for additional neutral MSSM Higgs bosons in the final state in proton-proton collisions at s = 13 TeV
The CMS Collaboration
Established effective Monte-Carlo generation method with higher-order calculations, including interference contributions.
[C8] Search for the associated production of a Higgs boson with a single top quark in proton-proton collisions at s = 8 TeV
The CMS collaboration
Served as co-editor. I took the responsibility of the Higgs to analysis channel. Made a special contribution to the development of a new lepton identification technique, leading to a factor of two reduction of the dominant backgrounds, with respect to the standard method.
[C9] Evidence for the 125 GeV Higgs boson decaying to a pair of -leptons
The CMS collaboration,
Contribution to the analysis itself, systematic uncertainty evaluation and the statistical representation of the results in the publication.
[C10] Measurement of the top-quark pair production cross-section with ATLAS in pp collisions at s = 7 TeV using final states with an electron or a muon and a hadronically decaying -lepton
The ATLAS collaboration
Served as co-editor. Ph.D thesis topic. First observation of this final state at the ATLAS experiment, and the interpretation of the result in the context of the charged Higgs boson.
D. Peer-reviewed conference proceedings
[D1] B physics results at CMS
Y. Takahashi on behalf of the CMS collaboration
2022, Proceedings of the 56th Rencontres de Moriond, QCD conference (submitted)
[D2] Leptoquark searches in CMS
Y. Takahashi on behalf of the CMS collaboration
ISBN:979-10-96879-08-3, 2018, Proceedings of the 53rd Rencontres de Moriond, Electroweak conference
[D3] Rare and Exotic decays of the Higgs boson at the LHC
Y. Takahashi on behalf of the CMS collaboration
ISBN:978-5-86763-405-6, 2016, Proceedings of the Large Hadron Collider Physics 2015 (LHCP2015) conference
[D4] Measurement of the top-quark pair production cross-section using final states with an electron or a muon and a hadronically decaying -lepton
Y. Takahashi on behalf of the ATLAS collaboration
Nucl. Phys. B (Proc. Suppl.) 253 (2014) 228, Proceedings of the twelfth international workshop on Tau-lepton physics (TAU2012)
[D5] ATLAS Muon Spectrometer
Y. Takahashi on behalf of the ATLAS collaboration
ISBN:978-981-4307-51-2, 2010, Proceedings of the 11th ICATPP Conference on Astroparticle, Particle, Space Physics, Detectors and Medical Physics Applications
E. Peer-reviewed books and monographs
[E1] Can we find a new interaction that can distinguish flavors?
[E2] Status and Prospect for Anomalies in B-Meson Decays
Y. Takahashi, Shigeki Hirose, Yutaro Sato, and Katsuro Nakamura
Journal of the Physical Society of Japan, Vol.75 (2020) No.1 16-21
[E3] Does the B-physics anomaly see the dream of new physics?
[E4] At the Leading Edge - The ATLAS and CMS LHC Experiments
Edited by Dan Green. February 2010. ISBN: 978-981-4277-61-7
My analysis results on measuring detection efficiencies of the ATLAS muon spectrometer were used.