2026-05-20
14:05 |
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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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2026-05-20
08:58 |
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2026-05-20
07:46 |
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2026-05-20
04:29 |
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2026-05-20
04:23 |
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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 |
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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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