Browsing Natural and Mathematical Sciences by Issue Date
Now showing items 21-40 of 932
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Study of the inclusive production of charged pions, kaons, and protons in pp collisions at root s=0.9, 2.76, and 7 TeV
(Springer Science+Business Media, 2012-10)Spectra of identified charged hadrons are measured in pp collisions at the LHC for root s = 0.9, 2.76, and 7 TeV. Charged pions, kaons, and protons in the transverse-momentum range p(T) approximate to 0.1-1.7 GeV/c and for ... -
Search for supersymmetry in hadronic final states using M-T2 in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-10)A search for supersymmetry or other new physics resulting in similar final states is presented using a data sample of 4.73 fb(-1) of pp collisions collected at root s = 7 TeV with the CMS detector at the LHC. Fully hadronic ... -
Search for supersymmetry in events with b-quark jets and missing transverse energy in pp collisions at 7 TeV
(American Physical Society, 2012-10-01)Results 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 ... -
Search for a W ' or Techni-rho Decaying into WZ in pp Collisions at root s=7 TeV
(American Physical Society, 2012-10-05)A search is performed in pp collisions at root s 7 TeV for exotic particles decaying via WZ to final states with electrons and muons. The data sample corresponds to an integrated luminosity of approximately 5 fb(-1). No ... -
Measurement of the pseudorapidity and centrality dependence of the transverse energy density in Pb-Pb collisions at root s(NN)=2.76 TeV
(American Physical Society, 2012-10-12)The transverse energy (E-T) in Pb-Pb collisions at 2.76 TeV nucleon-nucleon center-of-mass energy (root s(NN)) has been measured over a broad range of pseudorapidity (eta) and collision centrality by using the CMS detector ... -
Inclusive and differential measurements of the t(t)over-bar charge asymmetry in proton-proton collisions root s=7 TeV
(Elsevier, 2012-10-22)The t (t) over bar 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 ... -
Search for heavy Majorana neutrinos in μ±μ±+jets and e±e±+jets events in pp collisions at =7 TeV
(Elsevier, 2012-10-22)A search is performed for heavy Majorana neutrinos (N) using an event signature defined by two same-sign charged leptons of the same flavour and two jets. The data correspond to an integrated luminosity of 4.98 fb−1 of pp ... -
Search for new physics in the multijet and missing transverse momentum final state in proton-proton collisions at root s=7 TeV
(American Physical Society, 2012-10-26)A search for physics beyond the standard model is performed in events with at least three jets and large missing transverse momentum produced in proton-proton collisions at a center-of-mass energy of root s = 7 TeV. No ... -
Search for charge-asymmetric production of W ' bosons in t(t)over-bar + jet events from pp collisions at root s=7 TeV
(Elsevier, 2012-10-31)A 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 ... -
Search for electroweak production of charginos and neutralinos using leptonic final states in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-11)The 2011 dataset of the CMS experiment, consisting of an integrated luminosity of 4.98 fb(-1) of pp collisions at root s = 7 TeV, enables expanded searches for direct electroweak pair production of charginos and neutralinos ... -
Search for new physics with long-lived particles decaying to photons and missing energy in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-11)A search is performed for long-lived neutral particles decaying into a photon and invisible particles. An example of such a signature is the decay of the lightest neutralino with nonzero lifetime into a gravitino and a ... -
A search for a doubly-charged Higgs boson in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-11)A search for a doubly-charged Higgs boson in pp collisions at root s = 7 TeV is presented. The data correspond to an integrated luminosity of 4.9 fb(-1), collected by the CMS experiment at the LHC. The search is performed ... -
Search for the standard model Higgs boson produced in association with W and Z bosons in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-11)A search for the Higgs boson produced in association with a W or Z boson in proton-proton collisions at a center-of-mass energy of 7 TeV is performed with the CMS detector at the LHC using the full 2011 data sample, from ... -
Search for exclusive or semi-exclusive gamma gamma production and observation of exclusive and semi-exclusive e(+)e(-) production in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-11)A search for exclusive or semi-exclusive gamma gamma production, pp -> p(()*()) + gamma gamma + p(()*()) (where p* stands for a diffractively-dissociated proton), and the observation of exclusive and semi-exclusive e(+)e(-) ... -
Observation of sequential upsilon suppression in PbPb collisions
(American Physical Society, 2012-11-30)The suppression of the individual gamma (nS) states in PbPb collisions with respect to their yields in pp data has been measured. The PbPb and pp data sets used in the analysis correspond to integrated luminosities of 150 ... -
Observation of Z decays to four leptons with the CMS detector at the LHC
(Springer Science+Business Media, 2012-12)The first observation of the Z boson decaying to four leptons in proton-proton collisions is presented. The analyzed data set corresponds to an integrated luminosity of 5.02 fb(-1) at root s = 7 TeV collected by the CMS ... -
Measurement of the single-top-quark t-channel cross section in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-12)A measurement of the single-top-quark t-channel production cross section in pp collisions at root s = 7TeV with the CMS detector at the LHC is presented. Two different and complementary approaches have been followed. The ... -
Search for third-generation leptoquarks and scalar bottom quarks in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-12)Results are presented from a search for third-generation leptoquarks and scalar bottom quarks in a sample of proton-proton collisions at root s = 7TeV collected by the CMS experiment at the LHC, corresponding to an integrated ... -
Search for resonant t(t)over-bar production in lepton plus jets events in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-12)A model-independent search for the production of heavy resonances decaying into top-antitop quark pairs is presented. The search is based on events containing one lepton (muon or electron) and at least two jets selected ... -
Measurement of the top-quark mass in t(t)over-bar events with lepton plus jets final states in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-12)The mass of the top quark is measured using a sample of t (t) over bar candidate events with one electron or muon and at least four jets in the final state, collected by CMS in pp collisions at root s = 7TeV at the LHC. A ...
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