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CMS Conference Reports

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2026-05-19
13:12
Hot QCD matter probed via measurements of the speed of sound with CMS / Padula, Sandra (SAO_PAULO) /CMS Collaboration
A hot and dense quark-gluon medium is observed to be created in ultrarelativistic nuclear collisions, exhibiting striking collective flow behavior, with fluid-like properties well described by relativistic hydrodynamics, with minimal viscous dissipation. The characteristics of this medium are under intense investigation, and in particular, its thermodynamical properties. [...]
CMS-CR-2026-045.- Geneva : CERN, 2026 - 12 p. Fulltext: PDF;
In : 53rd International Symposium on Multiparticle Dynamics (ISMD) 2025, Corfu, Greece, 21 - 28 Sep 2025

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2026-05-19
13:12
Reliability assessment of CMS Drift Tubes readout electronics for the HL-LHC upgrade / Toffano, Marco (INFN, Padua)
The new readout electronics of the CMS Drift Tubes detector has been evaluated in terms of its reliability. Starting with a brief overview of the main functionalities of the board, operating requirements and critical elements, an initial estimate of the hardware robustness with respect to expected faults over time is then presented. [...]
CMS-CR-2026-041.- Geneva : CERN, 2026 - 10 p. Fulltext: PDF;

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2026-05-19
13:12
Hot QCD matter probed via measurements of the speed of sound with CMS / Padula, Sandra (SAO_PAULO) /CMS Collaboration
A hot and dense quark-gluon medium is observed to be created in ultrarelativistic nuclear collisions, exhibiting striking collective flow behavior, with fluid-like properties well described by relativistic hydrodynamics, with minimal viscous dissipation. The characteristics of this medium are under intense investigation, and in particular, its thermodynamical properties. [...]
CMS-CR-2026-045.- Geneva : CERN, 2026 - 12 p. Fulltext: PDF;
In : 53rd International Symposium on Multiparticle Dynamics (ISMD) 2025, Corfu, Greece, 21 - 28 Sep 2025

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2026-05-18
19:28
Searches for new physics with top quarks in ATLAS and CMS / Iemmi, Fabio (Beijing, Inst. High Energy Phys.) /ATLAS and CMS Collaborations
The latest results by the ATLAS and CMS Collaborations on searches for new physics phenomena involving the production of top quarks are summarized. Both direct searches for new particles and interpretations of Standard Model measurements in terms of the presence of new physics are reported..
CMS-CR-2026-040.- Geneva : CERN, 2026 - 6 p. Fulltext: PDF;
In : 60th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, It, 15 - 22 Mar 2026

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2026-05-08
10:11
The CMS ME0 GEM detector for the HL-LHC / De Bruyn, Isabelle Helena J (Brussels U.) /CMS Collaboration
The CMS Muon system is undergoing significant upgrades for High-Luminosity LHC operation, including the installation of the ME0 GEM detector. This detector is a 6-layer station that will expand the geometrical acceptance for muons up to pseudorapidity $\lvert\eta\rvert=2.8$. [...]
CMS-CR-2026-055.- Geneva : CERN, 2026 - 10 p. Fulltext: PDF;
In : Corfu 2025 Workshop on Future Accelerators, Corfu, Greece, Gr, 27 Apr. - 4 May 2025

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2026-04-24
14:21
Fabrication and characterization of Triple GEM detectors for HEP experiments / Giri Raj Mohan Sharma ; Dhingra, Nitish (Panjab U.) ; Chauhan, Sushil Singh (Panjab U.) ; Bhatnagar, Vipin (Panjab U.) /CMS Collaboration
Gas Electron Multiplier (GEM) detectors are advanced micro-pattern gaseous devices designed for particle detection in harsh radiation environments. The central feature of GEM detector is a thin metal-clad polymer (usually Kapton) foil chemically etched with a high density of microscopic bi-conical holes, where each hole acts as an individual proportional amplifier. [...]
CMS-CR-2026-021.- Geneva : CERN, 2026 - 10 p. Fulltext: PDF;
In : National Conference on Advanced Instrumentation for Nuclear Physics, High-Energy Physics, and Medical Imaging, Gaya, India, 23 - 25 mar 2026

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2026-04-22
11:52
Study of rare decays in the flavor sector at CMS / Buonsante, Marco (INFN, Bari ; Bari U.) /CMS Collaboration
Rare decays offer a unique window on the flavour structure of the Standard Model, as their strongly suppressed rates make them sensitive to small deviations induced by new physics. In this proceeding, we present CMS Run~3 results on rare decays in proton-proton collisions at $\sqrt{s}=13.6\,\mathrm{TeV}$, including the searches for rare $B_{(s)}^0\to\mu^+\mu^-\mu^+\mu^-$ and $\tau\to3\mu$ decays and the first observation of the $\eta\to\mu^+\mu^-e^+e^-$ decay..
CMS-CR-2026-039.- Geneva : CERN, 2026 - 5 p. Fulltext: PDF;
In : 60th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, It, 22 - 29 Mar 2026

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2026-04-22
11:52
Searches for New Physics at High Object Masses with CMS / Malara, Andrea (Brussels U.) /CMS Collaboration
Searches at high object masses probe both resonant production of new particles and nonresonant distortions of Standard Model spectra. This contribution follows the material presented in the Moriond Electroweak 2026 talk and summarizes recent CMS results in this regime: the Run~2 combination of heavy vector boson searches, the Run~3 search for $W^\prime \to \ell \nu$, the Run~2 dijet angular analysis, and searches for pair-produced dijet resonances in inclusive and $b$-tagged final states. No significant deviation from the SM expectation is observed, and the new results extend the sensitivity of CMS to multi-TeV scales in several benchmark scenarios..
CMS-CR-2026-037.- Geneva : CERN, 2026 - 7 p. Fulltext: PDF;
In : 60th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, It, 15 - 22 Mar 2026

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2026-04-22
11:52
Multiboson and VBS measurements in ATLAS and CMS / Folgueras, Santiago (Oviedo U.) /ATLAS and CMS Collaborations
A review of recent multiboson and vector boson scattering (VBS) measurements from the ATLAS and CMS Collaborations at the LHC is presented. Results are reported from precision diboson cross-section measurements, novel CP-sensitive and polarisation observables in $W\gamma$ production, VBS observations in semileptonic and fully leptonic final states including the first measurements at $\sqrt{s}=13.6\tev$, and observations of triboson processes. [...]
CMS-CR-2026-034.- Geneva : CERN, 2026 - 7 p. Fulltext: PDF;
In : 60th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, It, 15 - 22 Mar 2026

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2026-04-22
11:52
First look at $W^{\pm}W^{\pm}$ and $W^{\pm}Z$ vector boson scattering at $\sqrt{s}$ = 13.6 TeV / Ghimiray, Monika (NCBJ, Swierk) /CMS Collaboration
The measurement of the production cross-section for the $W^{\pm}W^{\pm}$ and $W^{\pm}Z$ channels at $\sqrt{s}=13.6$ TeV is presented using 171 $\mathrm fb^{-1}$ of proton-proton collision data collected with the CMS detector during 2022-2024, in the fully leptonic final states in association with two jets. The electroweak $W^{\pm}Z$ process is observed with a significance of about $7\sigma$, while the electroweak $W^{\pm}W^{\pm}$ signal is established well above $5\sigma$..
CMS-CR-2026-032.- Geneva : CERN, 2026 - 5 p. Fulltext: PDF;
In : 60th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, It, 15 - 22 Mar 2026

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