#CMSpaper: Measurement and effective field theory interpretation of the photon-fusion production cross section of a pair of W bosons in proton-proton collisions at √s = 13.6 TeV (arXiv:2601.21574) https://arxiv.org/abs/2601.21574 #StandardModel
CMS Publications
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Updates on the latest papers (#CMSpaper) and Physics Analysis Summaries (#CMSPAS) from @CMSexperiment at #CERN. Official account managed by @clelange
#CMSpaper soon on arXiv: Measurement and effective field theory interpretation of the photon-fusion production cross section of a pair of W bosons in proton-proton collisions at √s = 13.6 TeV (CERN-EP-2025-273) https://cds.cern.ch/record/2953615 #StandardModel
Measurement and effective field theory interpretation of the photon-fusion production cross section of a pair of W bosons in proton-proton collisions at $ \sqrt{s} = $ 13.6 TeV
This analysis presents an observation of the photon-fusion production of W boson pairs using the CMS detector at the LHC. The total cross section of the W$^+$W$^-$ production in photon fusion is measured using proton-proton collision data with an integrated luminosity of 138 fb$^{-1}$ collected with the CMS detector in 2016$-$2018 at a center-of-mass energy of $\sqrt{s}$ = 13 TeV. Events are selected in the final state with one isolated electron and one isolated muon, and no additional tracks associated with the electron-muon production vertex. The total and fiducial production cross sections are 643$^{+82}_{-78}$ fb and 3.96$^{+0.53}_{-0.51}$ fb, respectively, in agreement with the standard model predictions of 631 $\pm$ 126 fb and 3.87 $\pm$ 0.77 fb. This agreement enables stringent constraints to be imposed on anomalous quartic gauge couplings within a dimension-8 effective field theory framework.
#CMSpaper: Measurement of the Υ(1S), Υ(2S), and Υ(3S) differential cross sections in pp collisions at √s = 13.6 TeV (arXiv:2601.20023) https://arxiv.org/abs/2601.20023 #BPhysics
Measurement of the $Υ$(1S), $Υ$(2S), and $Υ$(3S) differential cross sections in pp collisions at $\sqrt{s}$ = 13.6 TeV
The production cross sections of the $Υ$(1S), $Υ$(2S), and $Υ$(3S) mesons are measured in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV, using a data sample collected in 2022 by the CMS experiment and corresponding to an integrated luminosity of 37.4 fb$^{-1}$. The measurement is performed in the $μ^+μ^-$ decay channels, differentially as a function of transverse momentum in the 20$-$200 GeV range, in the $\lvert y\rvert$ $\lt$ 0.6 and 0.6 $\lt$ $\lvert y\rvert$ $\lt$ 1.2 rapidity intervals.
#CMSpaper: Search for heavy resonances decaying into two Higgs bosons in the bb̅τ⁺τ⁻ final state in proton-proton collisions at √s = 13 TeV (arXiv:2601.20011) https://arxiv.org/abs/2601.20011 #NewPhysics
Search for heavy resonances decaying into two Higgs bosons in the $\mathrm{b\bar{b}}τ^+τ^-$ final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV
A search is presented for massive narrow-width resonances in the mass range of 1$-$4.5 TeV, decaying into pairs of Higgs bosons (HH). The search uses proton-proton collision data at a center-of-mass energy of 13 TeV collected with the CMS detector at the CERN LHC during 2016$-$2018, corresponding to an integrated luminosity of 138 fb$^{-1}$. The analysis targets final states where one Higgs boson decays into a pair of bottom quarks and the other into a pair of tau leptons, X $\to$ HH $\to$ $\mathrm{b\bar{b}}τ^+τ^-$. It uses a single large jet to reconstruct the H $\to$ $\mathrm{b\bar{b}}$ decay, while the H $\to$ $τ^+τ^-$ decay products can either be contained within a single large jet or appear as two isolated tau leptons. The observed data are consistent with standard model background expectations. Upper limits at 95% confidence level are set on the production cross section for resonant HH production for masses between 1 and 4.5 TeV. This analysis sets the most sensitive limits to date on X $\to$ HH $\to$ $\mathrm{b\bar{b}}τ^+τ^-$ decays in the mass range of 1.4 to 4.5 TeV.
#CMSpaper: Search for heavy long-lived charged particles with level-1 trigger scouting data from proton-proton collisions at √s = 13.6 TeV (arXiv:2601.20063) https://arxiv.org/abs/2601.20063 #NewPhysics
#CMSpaper soon on arXiv: Measurement of the Υ(1S), Υ(2S), and Υ(3S) differential cross sections in pp collisions at √s = 13.6 TeV (CERN-EP-2026-004) https://cds.cern.ch/record/2953566 #BPhysics
Measurement of the $ \Upsilon{\textrm{(1S)}} $, $ \Upsilon{\textrm{(2S)}} $, and $ \Upsilon{\textrm{(3S)}} $ differential cross sections in pp collisions at $ \sqrt{s} = $ 13.6 TeV
The production cross sections of the $ \Upsilon{\textrm{(1S)}} $, $ \Upsilon{\textrm{(2S)}} $, and $ \Upsilon{\textrm{(3S)}} $ mesons are measured in proton-proton collisions at $ \sqrt{s}= $ 13.6 TeV, using a data sample collected in 2022 by the CMS experiment and corresponding to an integrated luminosity of 37.4 fb$ ^{-1} $. The measurement is performed in the $ \mu^{+}\mu^{-} $ decay channels, differentially as a function of transverse momentum in the 20-200 GeV range, in the $ |y| < $ 0.6 and 0.6 $ < |y| < $ 1.2 rapidity intervals.
#CMSpaper soon on arXiv: Search for heavy resonances decaying into two Higgs bosons in the bb̅τ⁺τ⁻ final state in proton-proton collisions at √s = 13 TeV (CERN-EP-2025-299) https://cds.cern.ch/record/2953565 #NewPhysics
Search for heavy resonances decaying into two Higgs bosons in the $\mathrm{b\bar{b}}\tau^+\tau^-$ final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV
A search is presented for massive narrow-width resonances in the mass range of 1$-$4.5 TeV, decaying into pairs of Higgs bosons (HH). The search uses proton-proton collision data at a center-of-mass energy of 13 TeV collected with the CMS detector at the CERN LHC during 2016$-$2018, corresponding to an integrated luminosity of 138 fb$^{-1}$. The analysis targets final states where one Higgs boson decays into a pair of bottom quarks and the other into a pair of tau leptons, X $\to$ HH $\to$ $\mathrm{b\bar{b}}\tau^+\tau^-$. It uses a single large jet to reconstruct the H $\to$ $\mathrm{b\bar{b}}$ decay, while the H $\to$ $\tau^+\tau^-$ decay products can either be contained within a single large jet or appear as two isolated tau leptons. The observed data are consistent with standard model background expectations. Upper limits at 95\% confidence level are set on the production cross section for resonant HH production for masses between 1 and 4.5 TeV. This analysis sets the most sensitive limits to date on X $\to$ HH $\to$ $\mathrm{b\bar{b}}\tau^+\tau^-$ decays in the mass range of 1.4 to 4.5 TeV.
#CMSpaper soon on arXiv: Search for heavy long-lived charged particles with level-1 trigger scouting data from proton-proton collisions at √s = 13.6 TeV (CERN-EP-2025-301) https://cds.cern.ch/record/2953564 #NewPhysics
Search for heavy long-lived charged particles with level-1 trigger scouting data from proton-proton collisions at $ \sqrt{s} = $ 13.6 TeV
A search for heavy long-lived charged particles at the LHC is presented. Particles interacting with the CMS muon detector across several bunch crossings are searched for using a data sample of proton-proton collisions at $ \sqrt{s}= $ 13.6 TeV collected with the CMS detector in 2024, corresponding to an integrated luminosity of 3.7 fb$ ^{-1} $. This is the first search relying on the novel level-1 trigger scouting data set collected without any trigger selection, allowing correlations between bunch crossings to be analyzed. The results are interpreted as upper limits on the cross sections of several benchmark processes with pair production of heavy long-lived charged particles. Upper limits on the fiducial cross section of a heavy long-lived charged particle with $ p_{\mathrm{T}} > $ 500 GeV and $ |\eta| < $ 0.83 are also set in different ranges of $ \beta=v/c $. This analysis is a crucial proof of concept for the level-1 trigger data scouting system and complements existing searches for heavy long-lived charged particles by extending the sensitivity to lower $ \beta $ values.
#CMSpaper: Full event interpretation with machine-learning-based particle-flow reconstruction in the CMS detector (arXiv:2601.17554) https://arxiv.org/abs/2601.17554
#CMSpaper: Search for the pair production of long-lived supersymmetric partners of the tau lepton in proton-proton collisions at √s = 13 TeV (arXiv:2601.17576) https://arxiv.org/abs/2601.17576 #NewPhysics