Search
Results
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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 -
Search for a heavy gauge boson W′ in the final state with an electron and large missing transverse energy in pp collisions at √s=7 TeV
(2011)Physics Letters BA search for a heavy gauge boson W′ has been conducted by the CMS experiment at the LHC in the decay channel with an electron and large transverse energy imbalance ET miss, using proton–proton collision data corresponding to an integrated luminosity of 36 pb−1. No excess above standard model expectations is seen in the transverse mass distribution of the electron-ET miss system. Assuming standard-model-like couplings and decay branching ...Journal Article -
Search for microscopic black hole signatures at the Large Hadron Collider
(2011)Physics Letters BA search for microscopic black hole production and decay in pp collisions at a center-of-mass energy of 7 TeV has been conducted by the CMS Collaboration at the LHC, using a data sample corresponding to an integrated luminosity of 35 pb−1. Events with large total transverse energy are analyzed for the presence of multiple high-energy jets, leptons, and photons, typical of a signal expected from a microscopic black hole. Good agreement ...Journal Article -
Prompt and non-prompt J/ψ production in pp collisions at √s=7 TeV
(2011)The European Physical Journal CThe production of J/ψ mesons is studied in pp collisions at s√=7 TeV with the CMS experiment at the LHC. The measurement is based on a dimuon sample corresponding to an integrated luminosity of 314 nb−1. The J/ψ differential cross section is determined, as a function of the J/ψ transverse momentum, in three rapidity ranges. A fit to the decay length distribution is used to separate the prompt from the non-prompt (b hadron to J/ψ) component. ...Journal Article -
Dijet Azimuthal Decorrelations in pp Collisions at √s=7 TeV
(2011)Physical Review LettersMeasurements of dijet azimuthal decorrelations in pp collisions at √s=7 TeV using the CMS detector at the CERN LHC are presented. The analysis is based on an inclusive dijet event sample corresponding to an integrated luminosity of 2.9 pb−1. The results are compared to predictions from perturbative QCD calculations and various Monte Carlo event generators. The dijet azimuthal distributions are found to be sensitive to initial-state gluon ...Journal Article -
Search for heavy stable charged particles in pp collisions at √s=7 TeV
(2011)Journal of High Energy PhysicsThe result of a search at the LHC for heavy stable charged particles produced in pp collisions at s√=7TeV is described. The data sample was collected with the CMS detector and corresponds to an integrated luminosity of 3.1 pb−1. Momentum and ionization-energy-loss measurements in the inner tracker detector are used to identify tracks compatible with heavy slow-moving particles. Additionally, tracks passing muon identification requirements ...Journal Article -
Measurement of BB angular correlations based on secondary vertex reconstruction at √s=7 TeV
(2011)Journal of High Energy PhysicsA measurement of the angular correlations between beauty and anti-beauty hadrons (BB¯¯¯¯) produced in pp collisions at a centre-of-mass energy of 7 TeV at the CERN LHC is presented, probing for the first time the region of small angular separation. The B hadrons are identified by the presence of displaced secondary vertices from their decays. The B hadron angular separation is reconstructed from the decay vertices and the primary-interaction ...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 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 -
First measurement of the cross section for top-quark pair production in proton-proton collisions at √s=7 TeV
(2011)Physics Letters BThe first measurement of the cross section for top-quark pair production in pp collisions at the Large Hadron Collider at center-of-mass energy s=7 TeV has been performed using a data sample corresponding to an integrated luminosity of 3.1±0.3 pb-1 recorded by the CMS detector. This result utilizes the final state with two isolated, highly energetic charged leptons, large missing transverse energy, and two or more jets. Backgrounds from ...Journal Article