Search
Results
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Measurement of the inclusive W and Z production cross sections in pp collisions at root s = 7 TeV with the CMS experiment
(2011)Journal of High Energy PhysicsA measurement of inclusive W and Z production cross sections in pp collisions at s√=7 TeV is presented. The electron and muon decay channels are analyzed in a data sample collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 36 pb−1. The measured inclusive cross sections are σ(pp → WX) × B(W→ℓν) = 10.31 ± 0.02 (stat.) ± 0.09 (syst.) ± 0.10 (th.) ± 0.41 (lumi.) nb and σ(pp → ZX) × B(Z→ℓ+ℓ−) = 0.974 ± 0.007 ...Journal Article -
Measurement of the B+ Production Cross Section in pp Collisions at √s=7 TeV
(2011)Physical Review LettersMeasurements of the total and differential cross sections dσ/dpBT and dσ/dyB for B+ mesons produced in pp collisions at √s=7 TeV are presented. The data correspond to an integrated luminosity of 5.8 pb−1 collected by the CMS experiment operating at the LHC. The exclusive decay B+→J/ψK+, with J/ψ→μ+μ−, is used to detect B+ mesons and to measure the production cross section as a function of pBT and yB. The total cross section for pBT>5 GeV ...Journal Article -
Upsilon production cross section in pp collisions at √s=7 TeV
(2011)Physical Review DThe Υ(1S), Υ(2S), and Υ(3S) production cross sections in proton-proton collisions at √s=7 TeV are measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.1±0.3 pb−1. Integrated over the rapidity range |y|<2, we find the product of the Υ(1S) production cross section and branching fraction to dimuons to be σ(pp→Υ(1S)X)⋅B(Υ(1S)→μ+μ−)=7.37±0.13+0.61−0.42±0.81 nb, where the ...Journal Article -
Missing transverse energy performance of the CMS detector
(2011)Journal of InstrumentationDuring 2010 the LHC delivered pp collisions with a centre-of-mass energy of 7 TeV. In this paper, the results of comprehensive studies of missing transverse energy as measured by the CMS detector are presented. The results cover the measurements of the scale and resolution for missing transverse energy, and the effects of multiple pp interactions within the same bunch crossings on the scale and resolution. Anomalous measurements of missing ...Journal Article -
Search for supersymmetry in events with b jets and missing transverse momentum at the LHC
(2011)Journal of High Energy PhysicsA search for supersymmetry is presented using a sample of events with b jets and missing transverse momentum. The search uses a data sample of proton-proton collisions at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 35 pb−1, collected with the CMS detector. A total of 0.33+0.43−0.33 (stat.) ± 0.13 (syst.) events is predicted, using control samples in the data, to arise from standard model processes, and ...Journal Article -
Search for Stopped Gluinos in pp Collisions at √s=7 TeV
(2011)Physical Review LettersThe results of the first search for long-lived gluinos produced in 7 TeV pp collisions at the CERN Large Hadron Collider are presented. The search looks for evidence of long-lived particles that stop in the CMS detector and decay in the quiescent periods between beam crossings. In a dataset with a peak instantaneous luminosity of 1×1032 cm−2 s−1, an integrated luminosity of 10 pb−1, and a search interval corresponding to 62 hours of LHC ...Journal Article -
Measurement of the Isolated Prompt Photon Production Cross Section in pp Collisions at √s=7 TeV
(2011)Physical Review LettersThe differential cross section for the inclusive production of isolated prompt photons has been measured as a function of the photon transverse energy EγT in pp collisions at √s=7 TeV using data recorded by the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 2.9 pb−1. Photons are required to have a pseudorapidity |ηγ|<1.45 and EγT>21 GeV, covering the kinematic region 0.006<xT<0.086. The measured ...Journal Article -
Measurement of the t-Channel Single Top Quark Production Cross Section in pp Collisions at √s=7 TeV
(2011)Physical Review LettersElectroweak production of the top quark is measured for the first time in pp collisions at √s=7 TeV, using a data set collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 36 pb−1. With an event selection optimized for t-channel production, two complementary analyses are performed. The first one exploits the special angular properties of the signal, together with background estimates from the data. ...Journal Article -
Inclusive b-hadron production cross section with muons in pp collisions at √s=7 TeV
(2011)Journal of High Energy PhysicsA measurement of the b-hadron production cross section in proton-proton collisions at s√=7TeV is presented. The dataset, corresponding to 85 nb−1, was recorded with the CMS experiment at the LHC using a low-threshold single-muon trigger. Events are selected by the presence of a muon with transverse momentum pμT>6GeV with respect to the beam direction and pseudorapidity |η μ | < 2.1. The transverse momentum of the muon with respect to the ...Journal Article -
Measurement of the B(0) Production Cross Section in pp Collisions at root s=7 TeV
(2011)Physical Review LettersJournal Article