Search
Results
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Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC
(2017)Physics Letters BMeasurements of strange hadron (KS 0, Λ+Λ‾, and Ξ−+Ξ‾+) transverse momentum spectra in pp, pPb, and PbPb collisions are presented over a wide range of rapidity and event charged-particle multiplicity. The data were collected with the CMS detector at the CERN LHC in pp collisions at s=7TeV, pPb collisions at sNN=5.02TeV, and PbPb collisions at sNN=2.76TeV. The average transverse kinetic energy is found to increase with multiplicity, at a ...Journal Article -
Search for narrow resonances in dilepton mass spectra in proton-proton collisions at s√ = 13 TeV and combination with 8 TeV data
(2017)Physics Letters BA search for narrow resonances in dielectron and dimuon invariant mass spectra has been performed using data obtained from proton–proton collisions at √s = 13TeV collected with the CMS detector. The integrated luminosity for the dielectron sample is 2.7 fb−1 and for the dimuon sample 2.9 fb−1. The sensitivity of the search is increased by combining these data with a previously analyzed set of data obtained at √s = 8TeV and corresponding ...Journal Article -
Observation of Υ(1S) pair production in proton-proton collisions at √s= 8 TeV
(2017)Journal of High Energy PhysicsPair production of Y(1S) mesons is observed at the LHC in proton-proton collisions at s√=8 TeV by the CMS experiment in a data sample corresponding to an integrated luminosity of 20.7 fb−1. Both Y(1S) candidates are fully reconstructed via their decays to μ+μ−. The fiducial acceptance region is defined by an absolute Y(1S) rapidity smaller than 2.0. The fiducial cross section for the production of Y(1S) pairs, assuming that both mesons ...Journal Article -
A search for new phenomena in pp collisions at √s = 13 TeV in final states with missing transverse momentum and at least one jet using the αT variable
(2017)The European Physical Journal CA search for new phenomena is performed in final states containing one or more jets and an imbalance in transverse momentum in pp collisions at a centre-of-mass energy of 13TeV. The analysed data sample, recorded with the CMS detector at the CERN LHC, corresponds to an integrated luminosity of 2.3fb−1. Several kinematic variables are employed to suppress the dominant background, multijet production, as well as to discriminate between other ...Journal Article -
Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks
(2017)Physics Letters BA search for heavy resonances decaying to a Higgs boson and a vector boson is presented. The analysis is performed using data samples collected in 2015 by the CMS experiment at the LHC in proton–proton collisions at a center-of-mass energy of 13 TeV, corresponding to integrated luminosities of 2.2–2.5 fb−1. The search is performed in channels in which the vector boson decays into leptonic final states (Z→νν, W→ℓν, and Z→ℓℓ, with ℓ=e,μ), ...Journal Article -
Measurement of differential cross sections for top quark pair production using the lepton+jets final state in proton-proton collisions at 13 TeV
(2017)Physical Review DDifferential and double-differential cross sections for the production of top quark pairs in proton-proton collisions at 13 TeV are measured as a function of jet multiplicity and of kinematic variables of the top quarks and the top quark-antiquark system. This analysis is based on data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 2.3 fb−1. The measurements are performed in the lepton þ jets decay ...Journal Article -
Search for high-mass diphoton resonances in proton-proton collisions at 13 TeV and combination with 8 TeV search
(2017)Physics Letters BA search for the resonant production of high-mass photon pairs is presented. The search focuses on spin-0 and spin-2 resonances with masses between 0.5 and 4.5TeV, and with widths, relative to the mass, between 1.4 ×10−4and 5.6 ×10−2. The data sample corresponds to an integrated luminosity of 12.9fb−1of proton–proton collisions collected with the CMS detector in 2016 at a center-of-mass energy of 13TeV. No significant excess is observed ...Journal Article -
Measurements of the differential production cross sections for a Z boson in association with jets in pp collisions at √s = 8 TeV
(2017)Journal of High Energy PhysicsCross sections for the production of a Z boson in association with jets in proton-proton collisions at a centre-of-mass energy of s√=8 TeV are measured using a data sample collected by the CMS experiment at the LHC corresponding to 19.6 fb−1. Differential cross sections are presented as functions of up to three observables that describe the jet kinematics and the jet activity. Correlations between the azimuthal directions and the rapidities ...Journal Article -
Suppression and azimuthal anisotropy of prompt and nonprompt J/ψ production in PbPb collisions at √sNN = 2.76 TeV
(2017)The European Physical Journal CThe nuclear modification factor RAA and the azimuthal anisotropy coefficient v2 of prompt and nonprompt (i.e. those from decays of b hadrons) J/ψ mesons, measured from PbPb and pp collisions at √sNN = 2.76 TeVat the LHC, are reported. The results are presented in several event centrality intervals and several kinematic regions, for transverse momenta pT > 6.5GeV/c and rapidity |y| < 2.4, extending down to pT = 3GeV/c in the 1.6 < |y| < ...Journal Article -
Measurement of the WZ production cross section in pp collisions at s√ = 7 and 8 TeV and search for anomalous triple gauge couplings at s√ = 8 TeV
(2017)The European Physical Journal CThe WZ production cross section is measured by the CMS experiment at the CERN LHC in proton–proton collision data samples corresponding to integrated luminosities of 4.9fb−1 collected at s√=7TeV, and 19.6fb−1 at s√=8TeV. The measurements are performed using the fully-leptonic WZ decay modes with electrons and muons in the final state. The measured cross sections for 71<mZ<111GeV are σ(pp→WZ; s√=7TeV)=20.14±1.32(stat)±0.38(theo)±1.06(exp ...Journal Article