2026-05-20
14:05 |
Detaljert visning
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2026-05-20
13:55 |
New measurements of single top and $\mathrm{t \bar{t}}$ production at ATLAS and CMS
/ Jeppe, Laurids (CERN)
/ATLAS and CMS Collaborations
Recent measurements of single top and $\mathrm{t \bar{t}}$ production at the ATLAS and CMS
experiments are summarized. Topics covered are a measurement of
$t$-channel single top production at $\sqrt{s} = 5.02\,\mathrm{TeV}$, differential
$t$-channel cross sections at $\sqrt{s} = 13\,\mathrm{TeV}$, $\mathrm{WbW\bar{b}}$ differential
cross sections in the dilepton and lepton+jets channels probing on- and off-shell
top contributions, the most precise inclusive $\mathrm{t \bar{t}}$ cross section measurement to
date, the first observation of $\mathrm{t \bar{t}}$ production in PbPb collisions at $\sqrt{s_\mathrm{NN}}} = 5.36\,\mathrm{TeV}$, a combined
ATLAS+CMS measurement of the $\mathrm{t \bar{t}}$ spin-correlation observable $\Delta \varphi_{\ell\ell}$, and a characterization of the quantum state of the $\mathrm{t \bar{t}}$ system based on the spin density matrix..
CMS-CR-2026-046.-
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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2026-05-20
13:34 |
Study of the thermodynamic properties of hot QCD matter in the CMS experiment
/ Bernardes, Cesar Augusto (SAO_PAULO)
/CMS Collaboration
These proceedings summarize recent CMS measurements at the LHC that extract the squared speed of sound, \(c_s^2\), of strongly interacting matter at extreme temperatures from the multiplicity dependence of the mean transverse momentum in ultra-central lead-lead (PbPb) collisions at \(\sqrt{s_{\mathrm{NN}}} = 5.02\ \mathrm{TeV}\). The analysis yields \(c_s^2 = 0.241 \pm 0.002\, (\mathrm{stat}) \pm 0.016\, (\mathrm{syst})\) at an effective temperature of \(T_{\mathrm{eff}} = 219 \pm 8\, (\mathrm{syst})\ \mathrm{MeV}\), in good agreement with lattice-QCD calculations. [...]
CMS-CR-2026-023.-
Geneva : CERN, 2026 - 9 p.
Fulltext: PDF;
In : Advances in QCD at the LHC and the EIC, Rio De Janeiro, Br, 10 - 13 Nov 2025
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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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Detaljert visning
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2026-05-19
13:12 |
Detaljert visning
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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 |
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2026-05-08
10:11 |
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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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