Search
Results
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Multiplicity and transverse momentum dependence of two- and four-particle correlations in pPb and PbPb collisions
(2013)Physics Letters BMeasurements of two- and four-particle angular correlations for charged particles emitted in pPb collisions are presented over a wide range in pseudorapidity and full azimuth. The data, corresponding to an integrated luminosity of approximately 31nb-1, were collected during the 2013 LHC pPb run at a nucleon-nucleon center-of-mass energy of 5.02 TeV by the CMS experiment. The results are compared to 2.76 TeV semi-peripheral PbPb collision ...Journal Article -
Search for heavy narrow dilepton resonances in pp collisions at √s=7 TeV and √s=8 TeV
(2013)Physics Letters BAn updated search for heavy narrow resonances decaying to muon or electron pairs using the CMS detector is presented. Data samples from pp collisions at s=7TeV and 8 TeV at the LHC, with integrated luminosities of up to 5.3 and 4.1fb−1, respectively, are combined. No evidence for a heavy narrow resonance is observed. The analysis of the combined data sets excludes, at 95% confidence level, a Sequential Standard Model ZSSM′ resonance lighter ...Journal Article -
Measurement of W+W- and ZZ production cross sections in pp collisions at sqrt(s) = 8 TeV
(2013)Physics Letters BThe W+W- and ZZ production cross sections are measured in proton-proton collisions at root s = 8 TeV with the CMS experiment at the LHC in data samples corresponding to an integrated luminosity of up to 5.3 fb(-1). The measurements are performed in the leptonic decay modes W+W- -> l'vl '' v and ZZ -> 2l2l', where l = e, mu and l'(l '') = e, mu, tau. The measured cross sections sigma (pp -> W+W-) =, 69.9 +/- 2.8 (stat.) +/- 5.6 (syst.) 3.1 ...Journal Article -
Measurement of the Υ (1S), Υ (2S), and Υ (3S) cross sections in pp collisions at √s=7TeV
(2013)Physics Letters BThe Υ(1S), Υ(2S), and Υ(3S) production cross sections are measured using a data sample corresponding to an integrated luminosity of 35.8±1.4pb-1 of proton-proton collisions at s=7TeV, collected with the CMS detector at the LHC. The Υ resonances are identified through their decays to dimuons. Integrated over the Υ transverse momentum range pTΥ<50GeV/c and rapidity range |yΥ|<2.4, and assuming unpolarized Υ production, the products of the ...Journal Article -
Search for a Higgs boson decaying into a Z and a photon in pp collisions at √s=7 and 8TeV
(2013)Physics Letters BA search for a Higgs boson decaying into a Z boson and a photon is described. The analysis is performed using proton-proton collision datasets recorded by the CMS detector at the LHC. Events were collected at center-of-mass energies of 7 TeV and 8 TeV, corresponding to integrated luminosities of 5.0fb-1 and 19.6fb-1, respectively. The selected events are required to have opposite-sign electron or muon pairs. No excess above standard model ...Journal Article -
Event shapes and azimuthal correlations in Z plus jets events in pp collisions at root s=7 TeV
(2013)Physics Letters BMeasurements of event shapes and azimuthal correlations are presented for events where a Z boson is produced in association with jets in proton-proton collisions. The data collected with the CMS detector at the CERN LHC at root s = 7 TeV correspond to an integrated luminosity of 5.0 fb(-1). The analysis provides a test of predictions from perturbative QCD for a process that represents a substantial background to many physics channels. ...Journal Article -
Observation of long-range, near-side angular correlations in pPb collisions at the LHC
(2013)Physics Letters BResults on two-particle angular correlations for charged particles emitted in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV are presented. The analysis uses two million collisions collected with the CMS detector at the LHC. The correlations are studied over a broad range of pseudorapidity, η, and full azimuth, φ, as a function of charged particle multiplicity and particle transverse momentum, pT. In high-multiplicity ...Journal Article -
Search for a W' boson decaying to a bottom quark and a top quark in pp collisions at √s = 7 TeV
(2013)Physics Letters BResults are presented from a search for a W' boson using a dataset corresponding to 5.0fb-1 of integrated luminosity collected during 2011 by the CMS experiment at the LHC in pp collisions at s=7TeV. The W' boson is modeled as a heavy W boson, but different scenarios for the couplings to fermions are considered, involving both left-handed and right-handed chiral projections of the fermions, as well as an arbitrary mixture of the two. The ...Journal Article -
Search for new physics in events with opposite-sign leptons, jets, and missing transverse energy in pp collisions at root s=7 TeV
(2013)Physics Letters BA search is presented for physics beyond the standard model (BSM) in final states with a pair of opposite-sign isolated leptons accompanied by jets and missing transverse energy. The search uses LHC data recorded at a center-of-mass energy root s=7 TeV with the CMS detector, corresponding to an integrated luminosity of approximately 5 fb−1. Two complementary search strategies are employed. The first probes models with a specific dilepton ...Journal Article -
Forward–backward asymmetry of Drell–Yan lepton pairs in pp collisions at root s=7 TeV
(2013)Physics Letters BA measurement of the forward-backward asymmetry (AFB) of Drell-Yan lepton pairs in pp collisions at s=7TeV is presented. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of 5fb-1. The asymmetry is measured as a function of dilepton mass and rapidity in the dielectron and dimuon channels. Combined results from the two channels are presented, and are compared with the standard model predictions. The ...Journal Article