Search
Results
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Probing the chiral magnetic wave in pPb and PbPb collisions at sNN =5.02 TeV using charge-dependent azimuthal anisotropies
(2019)Physical Review CCharge-dependent anisotropy Fourier coefficients (vn) of particle azimuthal distributions are measured in pPb and PbPb collisions at √sNN=5.02TeV with the CMS detector at the LHC. The normalized difference in the second-order anisotropy coefficients (v2) between positively and negatively charged particles is found to depend linearly on the observed event charge asymmetry with comparable slopes for both pPb and PbPb collisions over a wide ...Journal Article -
Non-Gaussian elliptic-flow fluctuations in PbPb collisions at √sNN = 5.02 TeV
(2019)Physics Letters BEvent-by-event fluctuations in the elliptic-flow coefficient v2 are studied in PbPb collisions at √sNN=5.02 TeV using the CMS detector at the CERN LHC. Elliptic-flow probability distributions p(v2) for charged particles with transverse momentum 0.3<pT<3.0 GeV/c and pseudorapidity |η|<1.0 are determined for different collision centrality classes. The moments of the p(v2) distributions are used to calculate the v2 coefficients based on ...Journal Article -
Search for Higgs boson pair production in the γγbb‾ final state in pp collisions at s=13TeV
(2019)Physics Letters BA search is presented for the production of a pair of Higgs bosons, where one decays into two photons and the other one into a bottom quark–antiquark pair. The analysis is performed using proton–proton collision data at s=13TeV recorded in 2016 by the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9 fb-1. The results are in agreement with standard model (SM) predictions. In a search for resonant production, upper ...Journal Article -
Observation of Medium-Induced Modifications of Jet Fragmentation in Pb-Pb Collisions at 𝑠𝑁𝑁‾‾‾‾√= 5.02 TeV Using Isolated Photon-Tagged Jets
(2018)Physical Review LettersMeasurements of fragmentation functions for jets associated with an isolated photon are presented for the first time in pp and Pb-Pb collisions. The analysis uses data collected with the CMS detector at the CERN LHC at a nucleon-nucleon center-of-mass energy of 5.02 TeV. Fragmentation functions are obtained for jets with pTjet>30 GeV/c in events containing an isolated photon with pTγ>60 GeV/c, using charged tracks with transverse momentum ...Journal Article -
Pseudorapidity and transverse momentum dependence of flow harmonics in p Pb and PbPb collisions
(2018)Physical Review CMeasurements of azimuthal angular correlations are presented for high-multiplicity pPb collisions at √sNN=5.02TeV and peripheral PbPb collisions at √sNN=2.76TeV. The data used in this work were collected with the Compact Muon Solenoid (CMS) detector at the European Organization for Nuclear Research (CERN) Large Hadron Collider (LHC). Fourier coefficients as functions of transverse momentum and pseudorapidity are studied using the scalar ...Journal Article -
Search for Zγ resonances using leptonic and hadronic final states in proton-proton collisions at √s=13 TeV
(2018)Journal of High Energy PhysicsA search is presented for resonances decaying to a Z boson and a photon. The analysis is based on data from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1, and collected with the CMS detector at the LHC in 2016. Two decay modes of the Z boson are investigated. In the leptonic channels, the Z boson candidates are reconstructed using electron or muon pairs. In the hadronic ...Journal Article -
Measurement of the Z/𝛾∗→𝜏𝜏 cross section in pp collisions at √s=13 TeV and validation of 𝜏 lepton analysis techniques
(2018)The European Physical Journal CA measurement is presented of the Z/γ∗→ττ cross section in pp collisions at s√=13 TeV, using data recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 2.3 fb−1. The product of the inclusive cross section and branching fraction is measured to be σ(pp→Z/γ∗+X)B(Z/γ∗→ττ)=1848±12(stat)±67 (syst \,+\,lumi) pb, in agreement with the standard model expectation, computed at next-to-next-to-leading order accuracy ...Journal Article -
Search for R-parity violating supersymmetry in pp collisions at √s=13TeV using b jets in a final state with a single lepton, many jets, and high sum of large-radius jet masses
(2018)Physics Letters BResults are reported from a search for physics beyond the standard model in proton–proton collisions at a center-of-mass energy of s=13TeV. The search uses a signature of a single lepton, large jet and bottom quark jet multiplicities, and high sum of large-radius jet masses, without any requirement on the missing transverse momentum in an event. The data sample corresponds to an integrated luminosity of 35.9 fb−1 recorded by the CMS ...Journal Article -
Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at √s=13 TeV
(2018)Journal of High Energy PhysicsA measurement is performed of the cross section of top quark pair production in association with a W or Z boson using proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb−1, collected by the CMS experiment in 2016. The measurement is performed in the same-sign dilepton, three- and four-lepton final states. The production cross sections are measured to ...Journal Article -
Nuclear modification factor of D0 mesons in PbPb collisions at 𝑠NN‾‾‾‾√=5.02 TeV
(2018)Physics Letters BThe transverse momentum (pT) spectrum of prompt D0 mesons and their antiparticles has been measured via the hadronic decay channels D0 -> K-π+ and D0 -> K+π- in pp and PbPb collisions at a centre-of-mass energy of 5.02 TeV per nucleon pair with the CMS detector at the LHC. The measurement is performed in the D0 meson range of 2–100 GeV/c and in the rapidity range of y < 1 . The pp(PbPb) dataset used for this analysis corresponds to an ...Journal Article