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CMS Conference Reports

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2024-10-01
11:14
Machine learning based tau lepton identification for the CMS high-level trigger deployed for 13.6 TeV proton-proton collisions / Sarkisovi, Valentina (Aachen, Tech. Hochsch.) /CMS Collaboration
Tau leptons are important to several testable predictions of the standard model, including lepton spin polarization, and the Higgs Yukawa coupling to leptons. Tau leptons are also vital in the search for beyond the standard model physics, as many models predict new particles which decay into final states with tau leptons. [...]
CMS-CR-2024-244.- Geneva : CERN, 2024 - 4 p. Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024

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2024-10-01
11:14
Upgrade of the CMS Electromagnetic Calorimeter for High-Luminosity LHC / Amendola, Chiara (CERN) /CMS Collaboration
The CMS Electromagnetic Calorimeter (ECAL) is a homogeneous PbWO$_{4}$-based detector. The upcoming High-Luminosity upgrade of the CERN LHC will provide detectors with unprecedented instantaneous luminosity, entailing an increase of the average number of proton-proton collisions per bunch crossing up to a value of 200. [...]
CMS-CR-2024-213.- Geneva : CERN, 2024 - 6 p. Fulltext: PDF;
In : 25th international Workshop on Radiation Imaging Detectors (iWoRiD2024), Lisbon, Portugal, 30 Jun - 4 Jul 2024

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2024-10-01
11:14
Operation of CMS GE1/1 GEM detectors in Run-3 / Calzaferri, Simone (INFN, Pavia) /CMS Collaboration
The muon system of the CMS experiment at the LHC has been upgraded by the installation of the first station of Gas Electron Multiplier (GEM), GE1/1, over the Long Shutdown 2 (LS2). The High-Luminosity phase of the LHC (HL-LHC) upgrade for CMS incorporates two additional stations, GE2/1 and ME0. [...]
CMS-CR-2024-210.- Geneva : CERN, 2024 - 7 p. Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024

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2024-10-01
11:13
Performance of eco-friendly alternative gas mixtures in CMS iRPC detector in the HL-LHC environment / Gomes Pinheiro, Joao Pedro (Rio de Janeiro State U.) /CMS Collaboration
The RPC detectors in the CMS experiment operate with a gas mixture made of 95.2pct C2H2F4, known to be a greenhouse gas. Several eco-friendly alternatives to C2H2F4, such as HFO, have been studied in the last few years in order to find an alternative mixture with low Global-Warming Potential (GWP), while maintaining the performance of the RPC chambers. [...]
CMS-CR-2024-195.- Geneva : CERN, 2024 - 6 p. Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024

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2024-10-01
11:13
Online Monitoring System for the CMS GEM Detectors / Kaur, Anureet (Panjab U.) /CMS Collaboration
Upgrades to the Compact Muon Solenoid (CMS) system for the High-Luminosity Large Hardon Collider (HL-LHC) include the new Gas Electron Multiplier (GEM) detectors GE1/1, GE2/1, and ME0. The development of the GEM-Online Monitoring System (OMS) is crucial to their successful operation. [...]
CMS-CR-2024-194.- Geneva : CERN, 2024 - 5 p. Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024

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2024-09-30
18:18
Test beam results on 3D pixel sensors for the CMS Tracker upgrade at the High-Luminosity LHC / Lasaosa Garcia, Clara (Cantabria Inst. of Phys.)
The High Luminosity upgrade of the CERN Large Hadron Collider (HL-LHC) requires new high-radiation tolerant silicon pixel sensors for the innermost part of the tracking detector in the CMS experiment. The innermost layer of the tracker, which is as close $\mathrm{3\, cm}$ from the interaction point, will be exposed to a fluence of $\mathrm{3.4\times10^{16}\, n_{eq} cm^{-2}}$ during the high-luminosity operation period. [...]
CMS-CR-2024-182.- Geneva : CERN, 2024 - 10 p. Fulltext: PDF;
In : 25th international Workshop on Radiation Imaging Detectors (iWoRiD2024), Lisbon, Portugal, 30 Jun - 4 Jul 2024

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2024-09-30
17:49
Quality control results of the first CMS GE2/1 muon production chambers / Elkafrawy, Tamer (Florida Inst. Tech.) /CMS Collaboration
The CMS upgrade for the High Luminosity phase of the LHC involves the installation of three GEM stations GE1/1, GE2/1, and ME0. While GE1/1 has been operational since Run-3's onset, only two GE2/1 chambers are in place as of early 2024. [...]
CMS-CR-2024-189.- Geneva : CERN, 2024 - 5 p. Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024

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2024-09-30
16:50
Memories from the W Boson Discovery / Wulz, Claudia (Vienna, OAW) /CMS Collaboration
The fascinating story of a major discovery at CERN is outlined. The bold decision to convert its most powerful, and only recently inaugurated, proton accelerator to a proton-antiproton collider led to the discovery of the W and Z bosons - mediators of the weak interaction - in a record time, at the experiments UA1 and UA2. [...]
CMS-CR-2023-068.- Geneva : CERN, 2023 - 5 p. Fulltext: PDF;
In : 57th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 25 Mar - 1 Apr 2023

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2024-09-30
16:40
Searches for rare Higgs boson decays at CMS / Ardino, Rocco (INFN, Padua) /CMS Collaboration
The couplings of the Higgs boson to fermions have been studied with third and second generation quarks and leptons, while no direct measurements of its interactions with the lighter u, d, s quarks have been performed to date. The search for rare decays $\text{H}\to\gamma + \phi/\rho/\text{K}^{*0}/\psi\text{(nS)}$ can probe these couplings. [...]
CMS-CR-2024-233.- Geneva : CERN, 2024 - 7 p. Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024

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2024-09-30
16:40
Searches for rare Higgs boson production processes with the CMS detector / Cardini, Andrea (DESY) /CMS Collaboration
The full set of data collected by CMS experiment at a center of mass energy of 13 TeV allows searches for rare production modes of the Higgs boson, subdominant with respect to the ones already observed at the LHC, by using a variety of decay modes profiting of the ones with largest expected branching fractions. They include associate production of the Higgs with two b-quarks, with a c-quark, or vector boson scattering production with two associated Ws. [...]
CMS-CR-2024-201.- Geneva : CERN, 2024 - 7 p. Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024

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