Browsing Natural and Mathematical Sciences by Issue Date
Now showing items 1-20 of 1083
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Study of W boson production in PbPb and pp collisions at root s(NN)=2.76 TeV
(Elsevier, 2012)A 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 ... -
Theoretical determination of K(1)(1270,1400) mixing angle in QCD
(IOP Publishing, 2012)In quark model, the strange axial vector mesons K1(1270) and K1(1400) are defined as the mixtures of orbital angular momentum states K1A and K1B. In this work, by using the orthogonality of the mass eigenstates, we have ... -
Search for three-jet resonances in pp collisions at root s=7 TeV
(Elsevier, 2012)Results are reported from a search for the production of three-jet resonances in pp collisions at a center-of-mass energy root s = 7 TeV. The study uses the data sample collected by the CMS experiment at the LHC in 2011, ... -
Observation of a new Xi(b) baryon
(American Physical Society, 2012-06-22)The observation of a new b baryon via its strong decay into Xi(-)(b)pi(+) (plus charge conjugates) is reported. The measurement uses a data sample of pp collisions at root s = 7 TeV collected by the CMS experiment at the ... -
Search for a light charged Higgs boson in top quark decays in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-07)Results are presented on a search for a light charged Higgs boson that can be produced in the decay of the top quark t -> H(+)b and which, in turn, decays into tau(+)nu(tau). The analysed data correspond to an integrated ... -
Search for stopped long-lived particles produced in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-08)A search has been performed for long-lived particles that have stopped in the CMS detector, during 7TeV proton-proton operations of the CERN LHC. The existence of such particles could be inferred from observation of their ... -
Search for new physics in events with same-sign dileptons and b-tagged jets in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-08)A search for new physics is performed using isolated same-sign dileptons with at least two b-quark jets in the final state. Results are based on a 4.98 fb(-1) sample of proton-proton collisions at a centre-of-mass energy ... -
Measurement of the Λb cross section and the (Lambda)over-bar(b) to Λb ratio with J/ψΛ decays in pp collisions at root s=7 TeV
(Elsevier, 2012-08-14)The Lambda b differential production cross section and the cross section ratio sigma((Lambda) over bar (b))/sigma(Lambda(b)) are measured as functions of transverse momentum p(T)(Lambda b) rapidity vertical bar y(Lambda ... -
Search for narrow resonances in dilepton mass spectra in pp collisions at root s=7 TeV
(Elsevier, 2012-08-14)A search for narrow, high-mass resonances decaying to electron or muon pairs has been performed using pp collision data collected at root s = 7 TeV by the CMS experiment in 2011. The data sample corresponds to an integrated ... -
Search for new physics with same-sign isolated dilepton events with jets and missing transverse energy
(American Physical Society, 2012-08-17)A search for new physics is performed in events with two same-sign isolated leptons, hadronic jets, and missing transverse energy in the final state. The analysis is based on a data sample corresponding to an integrated ... -
Search for a fermiophobic Higgs boson in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-09)Combined results are reported from searches for a fermiophobic Higgs boson in the gamma gamma, WW, and ZZ decay modes in proton-proton collisions at root s = 7 TeV. The explored Higgs boson mass range is 110-300 GeV. The ... -
Search for dark matter and large extra dimensions in monojet events in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-09)A search has been made for events containing an energetic jet and an imbalance in transverse momentum using a data sample of pp collisions at a center-of-mass energy of 7 TeV. This signature is common to both dark matter ... -
Search for pair production of first- and second-generation scalar leptoquarks in pp collisions at root s=7 TeV
(American Physical Society, 2012-09-01)Results are presented from a search for the pair production of first- and second-generation scalar leptoquarks in proton-proton collisions at root s = 7 TeV. The data sample corresponds to an integrated luminosity of 5.0 ... -
Measurement of the electron charge asymmetry in inclusive w production in pp collisions at root s=7 TeV
(American Physical Society, 2012-09-14)A measurement of the electron charge asymmetry in inclusive pp -> W + X -> ev + X production at root s = 7 TeV is presented based on data recorded by the CMS detector at the LHC and corresponding to an integrated luminosity ... -
Search for high-mass resonances decaying into tau-lepton pairs in pp collisions at root s=7 TeV
(Elsevier, 2012-09-17)A search for high-mass resonances decaying into tau(+)tau(-) is performed using a data sample of pp collisions at root s = 7 TeV. The data were collected with the CMS detector at the LHC and correspond to an integrated ... -
Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
(Elsevier, 2012-09-17)Results are presented from searches for the standard model Higgs boson in proton-proton collisions at root s = 7 and 8 TeV in the Compact Muon Solenoid experiment at the LHC, using data samples corresponding to integrated ... -
Search for a light pseudoscalar higgs boson in the dimuon decay channel in pp collisions at root s=7 TeV
(American Physical Society, 2012-09-21)The dimuon invariant mass spectrum is searched in the range between 5.5 and 14 GeV for a light pseudoscalar Higgs boson a, predicted in a number of new physics models, including the next-to-minimal supersymmetric standard ... -
Tests of CMS hadron forward calorimeter upgrade readout box prototype
(IOP Publishing, 2012-10)A readout box prototype for the CMS Hadron Forward calorimeter upgrade was built and tested in the CERN H2 beamline. The prototype was designed to enable simultaneous tests of different readout options for the four anode ... -
Measurement of the top-quark mass in t(t)over-bar events with dilepton final states in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2012-10)The top-quark mass is measured in proton-proton collisions at root s = 7 TeV using a data sample corresponding to an integrated luminosity of 5.0 fb(-1) collected by the CMS experiment at the LHC. The measurement is performed ... -
Measurement of jet fragmentation into charged particles in pp and PbPb collisions at root s(NN)=2.76 TeV
(Springer Science+Business Media, 2012-10)Jet fragmentation in pp and PbPb collisions at a centre-of-mass energy of 2.76 TeV per nucleon pair was studied using data collected with the CMS detector at the LHC. Fragmentation functions are constructed using ...
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