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Measurements of differential jet cross sections in proton-proton collisions at √s=7 TeV with the CMS detector
(2013)Physical Review DJournal Article -
Measurement of the azimuthal anisotropy of neutral pions in PbPb collisions at √sNN=2.76 TeV
(2013)Physical Review LettersFirst measurements of the azimuthal anisotropy of neutral pions produced in Pb-Pb collisions at a center-of-mass energy of √sNN=2.76 TeV are presented. The amplitudes of the second Fourier component (v2) of the π0 azimuthal distributions are extracted using an event-plane technique. The values of v2 are studied as a function of the neutral pion transverse momentum (pT) for different classes of collision centrality in the kinematic range ...Journal Article -
Search for Z′ resonances decaying to t¯t in dilepton+jets final states in pp collisions at √s=7 TeV
(2013)Physical Review DA search for resonances decaying to top quark-antiquark pairs is performed using a dilepton+jets data sample recorded by the CMS experiment at the LHC in pp collisions at √s=7 TeV corresponding to an integrated luminosity of 5.0 fb−1. No significant deviations from the standard model background are observed. Upper limits are presented for the production cross section times branching fraction of top quark-antiquark resonances for masses ...Journal Article -
Search for new physics in final states with a lepton and missing transverse energy in pp collisions at the LHC
(2013)Physical Review DThis Letter describes the search for an enhanced production rate of events with a charged lepton and a neutrino in high-energy pp collisions at the LHC. The analysis uses data collected with the CMS detector, with an integrated luminosity of 5.0 fb−1 at √s=7 TeV, and a further 3.7 fb−1 at √s=8 TeV. No evidence is found for an excess. The results are interpreted in terms of limits on a heavy charged gauge boson (W′) in the sequential ...Journal Article -
Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in pp Collisions at √s=7 TeV
(2013)Physical Review LettersResults are presented from a search for the pair production of third-generation scalar and vector leptoquarks, as well as for top squarks in R-parity-violating supersymmetric models. In either scenario, the new, heavy particle decays into a τ lepton and a b quark. The search is based on a data sample of pp collisions at √s=7 TeV, which is collected by the CMS detector at the LHC and corresponds to an integrated luminosity of 4.8 fb−1. ...Journal Article -
Measurement of the ZZ production cross section and search for anomalous couplings in 2l2l' final states in pp collisions at √s =7 TeV
(2013)Journal of High Energy PhysicsA measurement is presented of the ZZ production cross section in the ZZ → 2ℓ2ℓ′ decay mode with ℓ = e, μ and ℓ′ = e, μ, τ in proton-proton collisions at s√=7 TeV with the CMS experiment at the LHC. Results are based on data corresponding to an integrated luminosity of 5.0 fb−1. The measured cross section σ(pp→ZZ)=6.24+0.86−0.80(stat.)+0.41−0.32(syst.)±0.14(lumi.)pb is consistent with the standard model predictions. The following limits ...Journal Article -
Rapidity distributions in exclusive Z+jet and γ+jet events in pp collisions at √s=7 TeV
(2013)Physical Review DRapidity distributions are presented for events containing either a Z boson or a photon with a single jet in proton-proton collisions produced at the CERN LHC. The data, collected with the CMS detector at √s=7 TeV, correspond to an integrated luminosity of 5.0 fb−1. The individual rapidity distributions of the boson and the jet are consistent within 5% with expectations from perturbative QCD. However, QCD predictions for the sum and the ...Journal Article -
Measurement of the production cross section for Zγ→ννˉγ in pp collisions at √s= 7 TeV and limits on ZZγ and Zγγ triple gauge boson couplings
(2013)Journal of High Energy PhysicsA measurement of the Zγ→νν¯¯¯γ cross section in pp collisions at √s=7 TeV is presented, using data corresponding to an integrated luminosity of 5.0 fb−1 collected with the CMS detector. This measurement is based on the observation of events with an imbalance of transverse energy in excess of 130 GeV and a single photon in the absolute pseudorapidity range |η| < 1.4 with transverse energy above 145 GeV. The Zγ→νν¯¯¯γ production cross section ...Journal Article -
Observation of a diffractive contribution to dijet production in proton-proton collisions at √s=7 TeV
(2013)Physical Review DThe cross section for dijet production in proton-proton collisions at √s=7 TeV is presented as a function of ˜ξ, a variable that approximates the fractional momentum loss of the scattered proton in single-diffractive events. The analysis is based on an integrated luminosity of 2.7 nb−1 collected with the CMS detector at the LHC at low instantaneous luminosities, and uses events with jet transverse momentum of at least 20 GeV. The dijet ...Journal Article -
Measurement of the B0s→μ+μ− branching fraction and search for B0→μ+μ− with the CMS Experiment
(2013)Physical Review LettersResults are presented from a search for the rare decays Bs0→μ+μ- and B0→μ+μ - in pp collisions at √s=7 and 8 TeV, with data samples corresponding to integrated luminosities of 5 and 20 fb-1, respectively, collected by the CMS experiment at the LHC. An unbinned maximum-likelihood fit to the dimuon invariant mass distribution gives a branching fraction B(Bs0→μ+μ-)=(3.0-0.9+1.0) ×10-9, where the uncertainty includes both statistical and ...Journal Article