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CMS Conference Reports

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2026-02-11
16:14
Top physics in ATLAS and CMS / Burgard, Carsten (Hamburg U.) /ATLAS and CMS Collaborations
Top-quark physics at the Large Hadron Collider has entered a precision era, enabled by the full Run 2 data set and the first results from Run 3. The large production cross section of top quarks allows for a diverse experimental program ranging from precision measurements of Standard Model parameters to searches for rare processes and indirect probes of physics beyond the Standard Model. [...]
CMS-CR-2026-005.- Geneva : CERN, 2026 - 13 p. Fulltext: PDF;
In : Corfu2025 Workshop on the Standard Model and Beyond, Corfu, Gr, 24 Aug - 3 Sep 2025

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2026-02-11
15:56
Simulation truth for optimal CMS pixel tracking / Jan Gerrit Schulz /CMS Collaboration
In the CMS experiment, pixel tracking means reconstructing charged particle trajectories based on hits in silicon pixel modules. This technique plays a major role in High Level Trigger (HLT) event reconstruction. [...]
CMS-CR-2026-014.- Geneva : CERN, 2026 - 7 p. Fulltext: PDF;
In : Connecting of The Dots 2025, Tokyo, Jp, 10 - 14 Nov 2025

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2026-02-11
15:56
Optimization and Outer Tracker Extension of the Cellular Automaton Algorithm for CMS Phase-2 HLT Tracking / Jan Gerrit Schulz /CMS Collaboration
The Phase-2 Upgrade for the CMS experiment at the High-Luminosity Large Hadron Collider introduces new and improved detectors, including a new tracker. It will enable higher-quality track reconstruction in the pixel detector, particularly in the forward region (pseudorapidity $\lvert\eta\rvert > 3$), by recording hits in many more layers than is currently possible. [...]
CMS-CR-2026-009.- Geneva : CERN, 2026 - 11 p. Fulltext: PDF;
In : Connecting of The Dots 2025, Tokyo, Jp, 10 - 14 Nov 2025

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2026-02-11
15:54
Humanising Science through CMS Outreach initiatives / Stathaki, Nefeli (CERN) /CMS Collaboration
In the increasingly fragmented media landscape where there is an overload of information reaching any member of the public, it is a human connection that cuts through. To maintain public support for the Large Hadron Collider (LHC) experiments and keep audiences invested in the continuous process of science, the research must be humanised. [...]
CMS-CR-2025-281.- Geneva : CERN, 2025 - 6 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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2026-02-11
15:54
Enhancing Particle Reconstruction and Identification with the MIP Timing Detector at CMS / Pauletto, Tiziano (INFN, Rome ; Rome U.) /CMS Collaboration
The MIP Timing Detector that will be installed at the CMS experiment is a novel kind of detector which will assign times to charged particles with an unprecedented resolution of 30-60 ps. This will allow vertex reconstruction in 4D, an essential feature to perform pileup mitigation in the high vertex multiplicity environment which is going to characterize the High-Luminosity phase of the LHC. [...]
CMS-CR-2025-213.- 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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2026-01-19
18:48
Status and performance of the CMS Electromagnetic Calorimeter in Run 3 of LHC / Tornago, Marta (IRFU, Saclay) /CMS Collaboration
The Electromagnetic Calorimeter (ECAL) of the CMS experiment at the LHC plays a vital role in various physics analyses, including Higgs boson studies and searches for new phenomena. Achieving accurate calibration of the detector and its individual channels is critical for optimizing the energy resolution of electrons and photons, as well as for measuring the electromagnetic components of jets and contributing to energy sums used to detect particles that do not generate a signal in the detector. [...]
CMS-CR-2026-002.- Geneva : CERN, 2026 - 11 p. Fulltext: PDF;
In : 14th International Conference on New Frontiers in Physics 2025 (ICNFP 2025), Kolymbari, Crete, Gr, 17 - 31 Jul 2025

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2026-01-19
18:48
Refining Tau Identification with Domain Adaptation Techniques at CMS / Zakharov, Stepan (DESY) /CMS Collaboration
Hadronically decaying tau leptons are a challenging signature to study given it can be mimicked by quark and gluon jets, electrons, or muons. The identification of this signature via a convolutional neural network performed by CMS during the LHC Run 2 brought a massive improvement with respect to previous strategies. [...]
CMS-CR-2025-284.- 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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2026-01-19
18:48
Search for Physics beyond the Standard Model in four- and three-top quark production / Shooshtari, Maryam (OAW, Vienna) /CMS Collaboration
A reinterpretation of four-top quark ($t\bar{t}t\bar{t}$) production is presented using the full Run~2 dataset recorded by the CMS experiment, corresponding to an integrated luminosity of 138\,fb$^{-1}$. The analysis targets BSM scenarios using the existing \tttt production measurement, including constraints on effective field theory (EFT) operators, top-philic heavy resonances, and the top-Yukawa coupling. [...]
CMS-CR-2025-260.- Geneva : CERN, 2025 - 7 p. Fulltext: PDF;
In : 18th International Workshop on Top Quark Physics (TOP2025), Seoul, South Korea, 21 - 26 Sep 2025

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2026-01-19
18:48
Review of the performance of the CMS hadron calorimeter / Wei, Yide (Nanjing Normal U.) ; Wang, Hui (Nanjing Normal U.) /CMS Collaboration
The hadron calorimeter is a central component of the CMS detector, vital for measuring hadron energies and reconstructing missing transverse momentum. This paper reviews its performance before and after the Phase~1 upgrade (completed in 2019), which upgraded both back-end and front-end electronics, including photodetectors and charge-integrating ADC with precise-timing TDC, as well as its depth segmentation in the barrel and endcaps. [...]
CMS-CR-2025-251.- Geneva : CERN, 2025 - 12 p. Fulltext: PDF;
In : 14th International Conference on New Frontiers in Physics 2025 (ICNFP 2025), Kolymbari, Crete, Gr, 17 - 31 Jul 2025

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2026-01-19
18:48
The CMS ME0 Upgrade Enhancing Forward Muon Reconstruction at the HL-LHC / Kaur, Anureet (Panjab U.) /CMS Collaboration
The CMS muon system is undergoing substantial upgrades to meet the challenges of the High-Luminosity LHC (HL-LHC), including the installation of the new Muon Endcap 0 (ME0) detector. Large-scale production started in 2024. [...]
CMS-CR-2025-249.- Geneva : CERN, 2025 - 6 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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