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2026-01-12
14:08
Probes of flavor symmetry and violation with top quarks in ATLAS and CMS / Strautnieks, Normunds Ralfs (LATVIA-UNIV) /ATLAS and CMS Collaborations
Measurements of lepton flavor universality (LFU) and searches for charged lepton flavor violation (cLFV) are one of the most straightforward ways of searching for Beyond Standard Model (BSM) physics. The numerous production of top quark pairs at the LHC allows for high precision measurements of LFU ratios and searches for cLFV signatures. [...]
CMS-CR-2025-296.- Geneva : CERN, 2025 - 9 p. Fulltext: PDF;
In : 18th International Workshop on Top Quark Physics (TOP2025), Seoul, South Korea, 21 - 26 Sep 2025

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2026-01-12
14:08
Development and Implementation of Non-Zero Suppression System for HGCAL / Akgul, Berke (Yildiz Tech. U.) ; Fedar, Yunus Emre (Yildiz Tech. U.) ; Yuksel, Osman (Yildiz Tech. U.) ; Yuksel, Ferhat (Yildiz Tech. U.) ; Erkmen, Burcu (Yildiz Tech. U.) ; Sakarya, Ufuk (Yildiz Tech. U.) ; Polat, N. T ; David Tinoco Mendes, Andre (CERN) ; Dauncey, Paul Dominic (Imperial Coll., London) ; Shukla, Raghunandan Atul (Imperial Coll., London) /CMS Collaboration
In preparation for operations at the HL-LHC, the CMS Collaboration is upgrading its endcap calorimeters with a high granularity calorimeter (HGCAL). The HGCAL back-end electronics includes two Non-Zero Suppression (NZS) boards, which dynamically disable zero-suppression in designated regions of interest. [...]
CMS-CR-2025-257.- Geneva : CERN, 2025 - 8 p. Fulltext: PDF;
In : Topical Workshop on Electronics for Particle Physics 2025, Rethymno, Crete, Greece, 6 - 10 Oct 2025

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2026-01-05
16:47
Multi-Scale Transformer Encoder for Di-Tau Invariant Mass Reconstruction at CMS / Camagni, Valentina (INFN, Milan Bicocca ; Milan Bicocca U.) /CMS Collaboration
A transformer-based encoder is proposed for the offline reconstruction of tau-lepton decays, with the goal of improving the estimation of the di-tau invariant mass. The model performs a regression of the transverse momentum of each tau candidate to recover the contribution carried away by neutrinos in the decay, while keeping $\eta$ and $\phi$ fixed in accordance with the collinear approximation valid in the targeted phase space. [...]
CMS-CR-2025-290.- Geneva : CERN, 2025 - 8 p. Fulltext: PDF;
In : 2025 European Physical Society Conference on High Energy Physics (EPS-HEP 2025), Marseille, France, 7 - 11 Jul 2025

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2026-01-05
16:47
Searching solo for the invisible at CMS / Mallampalli, Abhishikth (Wisconsin U., Madison) /CMS Collaboration
Despite the success of the Standard Model (SM), several fundamental questions remain unanswered, such as the nature of dark matter (DM), motivating searches for new physics. This paper summarizes three recent searches for new physics in proton-proton collisions at a center-of-mass energy of $\sqrt{s}=13$~TeV, using data recorded with the Compact Muon Solenoid (CMS) detector at the CERN Large Hadron Collider (LHC). [...]
CMS-CR-2025-271.- Geneva : CERN, 2025 - 8 p. Fulltext: PDF;
In : The 32nd International Symposium on Lepton Photon Interactions at High Energies (Lepton Photon 2025), Madison, Wisconsin, Us, 25 - 29 Aug 2025

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2025-12-19
10:05
Performance of triple-GEM detectors for the ME0 system of the CMS Phase-2 Upgrade / Nenna, Felice (INFN, Bari ; Bari U.) ; Pellecchia, Antonello (INFN, Bari ; Bari U.) ; Verwilligen, Piet Omer J (INFN, Bari) /CMS Collaboration
The High-Luminosity LHC will deliver proton-proton collisions at 5-7.5 times the nominal LHC luminosity, with 140-200 pp-interactions per bunch crossing. To maintain the performance of muon triggering and reconstruction under high-rate background, the forward part of the CMS muon spectrometer will be upgraded with Gas Electron Multiplier (GEM) detectors. [...]
CMS-CR-2025-188; CMS-CR-2025-187.- Geneva : CERN, 2025 - 9 p. - Published in : JINST 20 (2025) C12031 CR2025_187: PDF; publication: PDF;
In : 26th International Workshop on Radiation Imaging Detectors (IWORID 2025), Bratislava, Slovakia, 6 - 10 Jul 2025, pp.C12031

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2025-12-15
16:44
Mechanical Design and Integration of the CMS Phase-2 Tracker / Rose, Pierre (CERN) /CMS Collaboration
The mechanical design of the CMS Phase-2 Tracker addresses the stringent requirements imposed by the High Luminosity LHC environment, including stability under high radiation and thermal loads, a minimal material budget, and precise alignment across large detector volumes. This article describes the engineering challenges and the mechanical solutions implemented in both the Inner Tracker and the Outer Tracker. [...]
CMS-CR-2025-294.- Geneva : CERN, 2025 - 9 p. Fulltext: PDF;
In : 33rd International Workshop on Vertex Detectors (VERTEX 2025), Knoxville, Tennessee, United States, 25 - 29 Aug 2025

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2025-12-08
13:38
CMS outreach overview / Passaseo, Marina (INFN, Padua) /CMS Collaboration
Effective scientific communication and public outreach are essential components of modern high-energy physics research, serving to educate the public, engage stakeholders, and ensure continued support for fundamental science. This article presents a comprehensive analysis of the communication and outreach strategies implemented by the Compact Muon Solenoid (CMS) experiment at CERN, one of the flagship experiments at the Large Hadron Collider (LHC). [...]
CMS-CR-2025-286.- Geneva : CERN, 2025 - 8 p. Fulltext: PDF;
In : 2025 European Physical Society Conference on High Energy Physics (EPS-HEP 2025), Marseille, France, 7 - 11 Jul 2025

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2025-12-08
13:37
HGCAL detector performance and system validation with particle beams / Amendola, Chiara (CERN) /CMS Collaboration
The High-Granularity Calorimeter (HGCAL) is the new endcap calorimeter of CMS for operation in the High-Luminosity LHC (HL-LHC) era. Featuring 6 million silicon pads and 280'000 scintillating tiles, for an overall area of 620\,m$^{2}$ and 370\,m$^{2}$ respectively, HGCAL will deliver precise spatial, energy, and timing measurements of particles in its active volume. [...]
CMS-CR-2025-278.- Geneva : CERN, 2025 - 7 p. Fulltext: PDF;
In : 2025 European Physical Society Conference on High Energy Physics (EPS-HEP 2025), Marseille, France, 7 - 11 Jul 2025

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2025-12-08
13:37
The Present and Future of the CMS Muon System / Sharma, Archie (Aachen, Tech. Hochsch.) /CMS Collaboration
The CMS muon system is indispensable for identifying and studying key particles and processes at the LHC. A high-performance muon system not only underpins the discovery potential of CMS but also ensures the precision and reliability required for advancing our understanding of the fundamental laws of nature. [...]
CMS-CR-2025-276.- Geneva : CERN, 2025 - 12 p. Fulltext: PDF;
In : 17th Topical Seminar on Innovative Particle and Radiation Detectors , Siena, It, 15 - 19 Sep 2025

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2025-12-08
13:37
Upgrade of the CMS Drift Tube system for the High Luminosity LHC / Lunerti, Leonardo (INFN, Bologna) /CMS Collaboration
The Large Hadron Collider (LHC) will undergo a major upgrade during its third Long Shutdown (LS3) period, after which the High-Luminosity LHC (HL-LHC) era will begin. During the HL-LHC phase, proton-proton collisions are expected to be delivered at 5 to 7 times the nominal LHC instantaneous luminosity. [...]
CMS-CR-2025-273.- Geneva : CERN, 2025 - 9 p. Fulltext: PDF;
In : 17th Topical Seminar on Innovative Particle and Radiation Detectors , Siena, It, 15 - 19 Sep 2025

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