Search
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Search for the standard model Higgs boson in the H → ZZ → ℓ+ℓ−τ+τ− decay channel in pp collisions at √s=7TeV
(2012)Journal of High Energy PhysicsA search is reported for the standard model Higgs boson in the H → ZZ → ℓ+ℓ−τ +τ − decay mode, where ℓ = μ or e, in proton-proton collisions at s√=7TeV, corresponding to an integrated luminosity of 4.7 fb−1 collected with the CMS detector at the LHC. No evidence is found for a significant deviation from the background expectation. An upper limit four to twelve times larger than the predicted value is set at 95% confidence level for the ...Journal Article -
Search for anomalous production of multilepton events in pp collisions at √s=7 TeV
(2012)Journal of High Energy PhysicsA search for anomalous production of events with three or more isolated leptons in pp collisions at √s=7TeV is presented. The data, corresponding to an integrated luminosity of 4.98 fb−1, were collected by the CMS experiment at the LHC during the 2011 run. The search is applicable to any model of new physics that enhances multiple lepton production. The observed multilepton events are categorized into exclusive search channels based on ...Journal Article -
Suppression of non-prompt J/ψ, prompt J/ψ, and Υ (1S) in PbPb collisions at √sNN=2.76 TeV
(2012)Journal of High Energy PhysicsYields of prompt and non-prompt J/ψ, as well as Υ(1S) mesons, are measured by the CMS experiment via their μ + μ − decays in PbPb and pp collisions at sNN−−−√=2.76 TeV for quarkonium rapidity |y| < 2.4. Differential cross sections and nuclear modification factors are reported as functions of y and transverse momentum p T, as well as collision centrality. For prompt J/ψ with relatively high p T (6.5 < p T < 30 GeV/c), a strong, ...Journal Article -
Search for exclusive or semi-exclusive photon pair production and observation of exclusive and semi-exclusive electron pair production in pp collisions at √s=7 TeV
(2012)Journal of High Energy PhysicsA search for exclusive or semi-exclusive γγ production, pp → p(*) + γγ + p(*) (where p* stands for a diffractively-dissociated proton), and the observation of exclusive and semi-exclusive e+e− production, pp → p(*) + e+e− + p(*), in proton-proton collisions at s√=7 TeV, are presented. The analysis is based on a data sample corresponding to an integrated luminosity of 36 pb−1 recorded by the CMS experiment at the LHC at low instantaneous ...Journal Article -
Jet production rates in association with W and Z bosons in pp collisions at root s=7 TeV
(2012)Journal of High Energy PhysicsMeasurements of jet production rates in association with W and Z bosons for jet transverse momenta above 30 GeV are reported, using a sample of proton-proton collision events recorded by CMS at s√=7TeV, corresponding to an integrated luminosity of 36 pb − 1. The study includes the measurement of the normalized inclusive rates of jets σ(V + ≥ n jets)/σ(V), where V represents either a W or a Z. In addition, the ratio of W to Z cross sections ...Journal Article -
Search for supersymmetry in events with b-quark jets and missing transverse energy in pp collisions at 7 TeV
(2012)Physical Review DResults are presented from a search for physics beyond the standard model based on events with large missing transverse energy, at least three jets, and at least one, two, or three b-quark jets. The study is performed using a sample of proton-proton collision data collected at √s=7 TeV with the CMS detector at the LHC in 2011. The integrated luminosity of the sample is 4.98 fb−1. The observed number of events is found to be consistent ...Journal Article -
J/ψ and ψ(2S) production in pp collisions at √s=7Tev
(2012)Journal of High Energy PhysicsA measurement of the J/ψ and ψ(2S) production cross sections in pp collisions at s√=7TeV with the CMS experiment at the LHC is presented. The data sample corresponds to an integrated luminosity of 37 pb−1. Using a fit to the invariant mass and decay length distributions, production cross sections have been measured separately for prompt and non-prompt charmonium states, as a function of the meson transverse momentum in several rapidity ...Journal Article -
Shape, transverse size, and charged-hadron multiplicity of jets in pp collisions at √s=7TeV
(2012)Journal of High Energy PhysicsMeasurements of jet characteristics from inclusive jet production in protonproton collisions at a centre-of-mass energy of 7 TeV are presented. The data sample was collected with the CMS detector at the LHC during 2010 and corresponds to an integrated luminosity of 36 pb−1. The mean charged-hadron multiplicity, the differential and integral jet shape distributions, and two independent moments of the shape distributions are measured as ...Journal Article -
Exclusive γγ → μ + μ − production in proton-proton collisions at √s=7 TeV
(2012)Journal of High Energy PhysicsA measurement of the exclusive two-photon production of muon pairs in proton-proton collisions at s√=7 TeV, pp → pμ + μ −p, is reported using data corresponding to an integrated luminosity of 40 pb−1. For muon pairs with invariant mass greater than 11.5 GeV, transverse momentum p T (μ) > 4 GeV and pseudorapidity |η(μ)| < 2.1, a fit to the dimuon p T (μ + μ −) distribution results in a measured cross section of σ(p → pμ + μ −p) = 3.38+0.58−0.55 ...Journal Article -
Search for electroweak production of charginos and neutralinos using leptonic final states in pp collisions at √s=7 TeV
(2012)Journal of High Energy PhysicsThe 2011 dataset of the CMS experiment, consisting of an integrated luminosity of 4.98 fb−1 of pp collisions at s√=7 TeV, enables expanded searches for direct electroweak pair production of charginos and neutralinos in supersymmetric models as well as their analogs in other models of new physics. Searches sensitive to such processes, with decays to final states that contain two or more leptons, are presented. Final states with three ...Journal Article