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Search for pair-produced vector-like leptons in final states with third-generation leptons and at least three b quark jets in proton-proton collisions at √s = 13 TeV
(2023)Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy PhysicsThe first search is presented for vector-like leptons (VLLs) in the context of the “4321 model”, an ultraviolet-complete model with the potential to explain existing B physics measurements that are in tension with standard model predictions. The analyzed data, corresponding to an integrated luminosity of 96.5 fb⁻¹, were recorded in 2017 and 2018 with the CMS detector at the LHC in proton-proton collisions at √s = 13 TeV. Final states with ...Journal Article -
Search for the Higgs boson decay to a pair of electrons in proton-proton collisions at √s = 13 TeV
(2023)Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy PhysicsA search is presented for the Higgs boson decay to a pair of electrons (e⁺e⁻) in proton-proton collisions at √s = 13 TeV. The data set was collected with the CMS experiment at the LHC between 2016 and 2018, corresponding to an integrated luminosity of 138 fb⁻¹. The analysis uses event categories targeting Higgs boson production via gluon fusion and vector boson fusion. The observed upper limit on the Higgs boson branching fraction to an ...Journal Article -
Measurement of the tt¯ charge asymmetry in events with highly Lorentz-boosted top quarks in pp collisions at √s = 13 TeV
(2023)Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy PhysicsThe measurement of the charge asymmetry in top quark pair events with highly Lorentz-boosted top quarks decaying to a single lepton and jets is presented. The analysis is performed using proton-proton collisions at √s = 13 TeV with the CMS detector at the LHC and corresponding to an integrated luminosity of 138 fb⁻¹. The selection is optimized for top quarks produced with large Lorentz boosts, resulting in nonisolated leptons and overlapping ...Journal Article -
First measurement of the forward rapidity gap distribution in pPb collisions at √sNN = 8.16 TeV
(2023)Physical Review DFor the first time at LHC energies, the forward rapidity gap spectra from proton-lead collisions for both proton and lead dissociation processes are presented. The analysis is performed over 10.4 units of pseudorapidity at a center-of-mass energy per nucleon pair of √sNN = 8.16 TeV, almost 300 times higher than in previous measurements of diffractive production in proton-nucleus collisions. For lead dissociation processes, which correspond ...Journal Article -
Performance of the local reconstruction algorithms for the CMS hadron calorimeter with Run 2 data
(2023)Journal of InstrumentationA description is presented of the algorithms used to reconstruct energy deposited in the CMS hadron calorimeter during Run 2 (2015–2018) of the LHC. During Run 2, the characteristic bunch-crossing spacing for proton-proton collisions was 25 ns, which resulted in overlapping signals from adjacent crossings. The energy corresponding to a particular bunch crossing of interest is estimated using the known pulse shapes of energy depositions ...Journal Article -
Measurements of the azimuthal anisotropy of prompt and nonprompt charmonia in PbPb collisions at √sNN = 5.02 TeV
(2023)Journal of High Energy PhysicsThe second-order (v2) and third-order (v3) Fourier coefficients describing the azimuthal anisotropy of prompt and nonprompt (from b-hadron decays) J/ψ, as well as prompt ψ(2S) mesons are measured in lead-lead collisions at a center-of-mass energy per nucleon pair of √sNN = 5.02 TeV. The analysis uses a data set corresponding to an integrated luminosity of 1.61 nb−1 recorded with the CMS detector. The J/ψ and ψ(2S) mesons are reconstructed ...Journal Article -
Observation of τ Lepton Pair Production in Ultraperipheral Pb-Pb Collisions at √sNN = 5.02 TeV
(2023)Physical Review LettersWe present an observation of photon-photon production of τ lepton pairs in ultraperipheral lead-lead collisions. The measurement is based on a data sample with an integrated luminosity of 404μb⁻¹ collected by the CMS experiment at a center-of-mass energy per nucleon pair of √sNN = 5.02 TeV. The γγ → τ⁺τ⁻ process is observed for τ⁺τ⁻ events with a muon and three charged hadrons in the final state. The measured fiducial cross section is ...Journal Article -
Search for the lepton-flavor violating decay of the Higgs boson and additional Higgs bosons in the eμ final state in proton-proton collisions at √ s = 13 TeV
(2023)Physical Review DA search for the lepton-flavor violating decay of the Higgs boson and potential additional Higgs bosons with a mass in the range 110–160 GeV to an e±μ∓ pair is presented. The search is performed with a proton-proton collision dataset at a center-of-mass energy of 13 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 138 fb⁻¹. No excess is observed for the Higgs boson. The observed (expected) upper ...Journal Article -
A search for decays of the Higgs boson to invisible particles in events with a top-antitop quark pair or a vector boson in proton-proton collisions at √s=13TeV
(2023)The European Physical Journal CA search for decays to invisible particles of Higgs bosons produced in association with a top-antitop quark pair or a vector boson, which both decay to a fully hadronic final state, has been performed using proton-proton collision data collected at √s = 13 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 138 fb⁻¹. The 95% confidence level upper limit set on the branching fraction of the 125 GeV Higgs boson ...Journal Article -
Measurement of the top quark mass using a profile likelihood approach with the lepton + jets final states in proton–proton collisions at √s = 13 TeV
(2023)The European Physical Journal CThe mass of the top quark is measured in 36.3 fb⁻¹ of LHC proton–proton collision data collected with the CMS detector at √s = 13 TeV. The measurement uses a sample of top quark pair candidate events containing one isolated electron or muon and at least four jets in the final state. For each event, the mass is reconstructed from a kinematic fit of the decay products to a top quark pair hypothesis. A profile likelihood method is applied ...Journal Article