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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 -
Search for charge-asymmetric production of W′ bosons in top pair + jet events from pp collisions at √s = 7 TeV
(2012)Physics Letters BA search is presented for charge-asymmetric production of a W' boson that has been proposed to accommodate the forward-backward asymmetry observed in the production of top-antitop quark pairs at the Tevatron. The new heavy W' boson would be produced in association with a top quark and would decay into top and down quarks. The data correspond to an integrated luminosity of 5.0 fb(-1) in pp collisions at a center-of-mass energy of 7 TeV, ...Journal Article -
Search for the standard model Higgs boson decaying to W+W− in the fully leptonic final state in pp collisions at √ s = 7 TeV
(2012)Physics Letters BA search for the standard model Higgs boson decaying to W +W - in pp collisions at s=7 TeV is reported. The data are collected at the LHC with the CMS detector, and correspond to an integrated luminosity of 4.6 fb -1. The W +W - candidates are selected in events with two charged leptons and large missing transverse energy. No significant excess of events above the standard model background expectations is observed, and upper limits on the ...Journal Article -
Study of W boson production in PbPb and pp collisions at √s[NN] = 2.76 TeV
(2012)Physics Letters BA measurement is presented of W-boson production in PbPb collisions carried out at a nucleon-nucleon (NN) centre-of-mass energy root S-NN of 2.76 TeV at the LHC using the CMS detector. In data corresponding to an integrated luminosity of 7.3 mu b(-1), the number of W -> mu v(mu) decays is extracted in the region of muon pseudorapidity vertical bar eta mu vertical bar < 2.1 and transverse momentum p(T)(mu) > 25 GeV/c. Yields of muons found ...Journal Article -
Inclusive and differential measurements of the ttˉ charge asymmetry in proton–proton collisions at 7 TeV
(2012)Physics Letters BThe tt- charge asymmetry is measured in events containing a charged lepton (electron or muon) and at least four jets, one of which is identified as originating from b-quark hadronization. The analyzed dataset corresponds to an integrated luminosity of 5.0 fb -1 collected with the CMS detector at the LHC. An inclusive and three differential measurements of the tt- charge asymmetry as a function of rapidity, transverse momentum, and invariant ...Journal Article -
Jet momentum dependence of jet quenching in PbPb collisions at root s(NN)=2.76 TeV
(2012)Physics Letters BDijet production in PbPb collisions at a nucleon–nucleon center-of-mass energy of 2.76 TeV is studied with the CMS detector at the LHC. A data sample corresponding to an integrated luminosity of 150 μb−1 is analyzed. Jets are reconstructed using combined information from tracking and calorimetry, using the anti-kT algorithm with R = 0.3. The dijet momentum balance and angular correlations are studied as a function of collision centrality ...Journal Article -
Search for a new bottomonium state decaying to ϒ(1S)π+π− in pp collisions at s√ = 8 TeV
(2013)Physics Letters BThe results of a search for the bottomonium counterpart, denoted as Xb, of the exotic charmonium state X(3872) is presented. The analysis is based on a sample of pp collisions at s=8 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 20.7 fb-1. The search looks for the exclusive decay channel Xb→Υ{hooked}(1S)π+π- followed by Υ{hooked}(1S)→μ+μ-. No evidence for an Xb signal is observed. Upper limits ...Journal Article -
Search for high mass resonances decaying into τ-lepton pairs in pp collisions at s√=7 TeV
(2012)Physics Letters BA search for high-mass resonances decaying into τ+ τ- is performed using a data sample of pp collisions at s√=7 TeV. The data were collected with the CMS detector at the LHC and correspond to an integrated luminosity of 4.9 fb−1. The number of observed events is in agreement with the standard model prediction. An upper limit on the product of the resonance cross section and branching fraction into τ-lepton pairs is calculated as a function ...Journal Article -
Search for the standard model Higgs boson decaying to bottom quarks in pp collisions at sqrt(s)=7 TeV
(2012)Physics Letters BA search for the standard model Higgs boson (H) decaying to (b) over barb when produced in association with weak vector bosons (V) is reported for the following modes: W(mu nu)H, W(e nu)H, Z(mu mu)H, Z(ee)H and Z(nu nu)H. The search is performed in a data sample corresponding to an integrated luminosity of 4.7 fb(-1), recorded by the CMS detector in proton-proton collisions at the LHC with a center-of-mass energy of 7 TeV. No significant ...Journal Article -
Search for anomalous production of highly boosted Z bosons decaying to mu(+)mu(-) in proton-proton collisions at s√=7 TeV
(2013)Physics Letters BResults are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to mu(+)mu(-). Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at root s = 7 TeV, corresponding to an integrated luminosity of 5.0 fb(-1) recorded with the CMS detector. The shape of the observed transverse momentum distribution of Z bosons is consistent ...Journal Article