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Measurement of the production cross section of a Higgs boson with large transverse momentum in its decays to a pair of τ leptons in proton-proton collisions at √s = 13TeV
(2024)Physics Letters BA measurement of the production cross section of a Higgs boson with transverse momentum greater than 250 GeV is presented where the Higgs boson decays to a pair of τ leptons. It is based on proton-proton collision data collected by the CMS experiment at the CERN LHC at a center-of-mass energy of 13 TeV. The data sample corresponds to an integrated luminosity of 138 fb⁻¹. Because of the large transverse momentum of the Higgs boson the τ ...Journal Article -
Searches for violation of Lorentz invariance in top quark pair production using dilepton events in 13 TeV proton-proton collisions
(2024)Physics Letters BA search for violation of Lorentz invariance in the production of top quark pairs (tt) is presented. The measured normalized differential tt production cross section, as a function of the sidereal time, is examined for potential modulations induced by Lorentz-invariance breaking operators in an effective field theory extension of the standard model (SM). The cross section is measured from collision events collected by the CMS detector at ...Journal Article -
K⁰ₛ and Λ(Λ‾) two-particle femtoscopic correlations in PbPb collisions at √s_NN = 5.02TeV
(2024)Physics Letters BTwo-particle correlations are presented for K⁰ₛ, Λ, and Λ‾ strange hadrons as a function of relative momentum in lead-lead collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The dataset corresponds to an integrated luminosity of 0.607 nb⁻¹ and was collected using the CMS detector at the CERN LHC. These correlations are sensitive to quantum statistics and to final-state interactions between the particles. The source size ...Journal Article -
Measurement of Energy Correlators inside Jets and Determination of the Strong Coupling α_s(m_Z)
(2024)Physical Review LettersEnergy correlators that describe energy-weighted distances between two or three particles in a hadronic jet are measured using an event sample of √s = 13 TeV proton-proton collisions collected by the CMS experiment and corresponding to an integrated luminosity of 36.3 fb⁻¹. The measured distributions are consistent with the trends in the simulation that reveal two key features of the strong interaction: confinement and asymptotic freedom. ...Journal Article -
Evidence for tWZ production in proton-proton collisions at √s = 13 TeV in multilepton final states
(2024)Physics Letters BThe first evidence for the standard model production of a top quark in association with a W boson and a Z boson is reported. The measurement is performed in multilepton final states, where the Z boson is reconstructed via its decays to electron or muon pairs. At least one W boson, associated or from top quark decay, decays leptonically, too. The analysed data were recorded by the CMS experiment at the CERN LHC in 2016–2018 in proton-proton ...Journal Article -
Constraints on anomalous Higgs boson couplings from its production and decay using the WW channel in proton–proton collisions at √s = 13 TeV
(2024)The European Physical Journal CA study of the anomalous couplings of the Higgs boson to vector bosons, including CP-violation effects, has been conducted using its production and decay in the WW channel. This analysis is performed on proton–proton collision data collected with the CMS detector at the CERN LHC during 2016–2018 at a center-of-mass energy of 13 TeV, and corresponds to an integrated luminosity of 138 fb⁻¹. The different-flavor dilepton (eμ) final state is ...Journal Article -
Measurement of multijet azimuthal correlations and determination of the strong coupling in proton-proton collisions at √s = 13 TeV
(2024)The European Physical Journal CA measurement is presented of a ratio observable that provides a measure of the azimuthal correlations among jets with large transverse momentum p_T. This observable is measured in multijet events over the range of p_T = 360–3170 GeV based on data collected by the CMS experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 134 fb⁻¹. The results are compared with predictions ...Journal Article -
Search for long-lived particles decaying in the CMS muon detectors in proton-proton collisions at √s = 13 TeV
(2024)Physical Review DA search for long-lived particles (LLPs) decaying in the CMS muon detectors is presented. A data sample of proton-proton collisions at √s = 13 TeV corresponding to an integrated luminosity of 138 fb⁻¹, recorded at the LHC in 2016–2018, is used. The decays of LLPs are reconstructed as high multiplicity clusters of hits in the muon detectors. In the context of twin Higgs models, the search is sensitive to LLP masses from 0.4 to 55 GeV and ...Journal Article -
Search for new physics in high-mass diphoton events from proton-proton collisions at √s = 13 TeV
(2024)Journal of High Energy PhysicsResults are presented from a search for new physics in high-mass diphoton events from proton-proton collisions at s = 13 TeV. The data set was collected in 2016–2018 with the CMS detector at the LHC and corresponds to an integrated luminosity of 138 fb−1. Events with a diphoton invariant mass greater than 500 GeV are considered. Two different techniques are used to predict the standard model backgrounds: parametric fits to the smoothly-falling ...Journal Article -
Observation of the ϒ(3S) Meson and Suppression of ϒ States in Pb-Pb Collisions at √sNN = 5.02 TeV
(2024)Physical Review LettersThe production of ϒ(2S) and ϒ(3S) mesons in lead-lead (Pb-Pb) and proton-proton (pp) collisions is studied in their dimuon decay channel using the CMS detector at the LHC. The ϒ(3S) meson is observed for the first time in Pb-Pb collisions, with a significance above 5 standard deviations. The ratios of yields measured in Pb-Pb and pp collisions are reported for both the ϒ(2S) and ϒ(3S) mesons, as functions of transverse momentum and Pb-Pb ...Journal Article