Browsing Natural and Mathematical Sciences by Title
Now showing items 131-150 of 1083
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Event generator tunes obtained from underlying event and multiparton scattering measurements
(2016-03)New sets of parameters (“tunes”) for the underlying-event (UE) modelling of the pythia8, pythia6 and herwig++ Monte Carlo event generators are constructed using different parton distribution functions. Combined fits to CMS ... -
Event shape variables measured using multijet final states in proton-proton collisions at s√=13 TeV
(Springer Nature, 2018-12-01)The study of global event shape variables can provide sensitive tests of predictions for multijet production in proton-proton collisions. This paper presents a study of several event shape variables calculated using jet ... -
Event shapes and azimuthal correlations in Z plus jets events in pp collisions at root s=7 TeV
(Elsevier, 2013-05-23)Measurements of event shapes and azimuthal correlations are presented for events where a Z boson is produced in association with jets in proton-proton collisions. The data collected with the CMS detector at the CERN LHC ... -
Evidence for associated production of a single top quark and W boson in pp collisions at root s=7 TeV
(American Physical Society, 2013-01-11)Evidence is presented for the associated production of a single top quark and W boson in pp collisions at root s = 7 TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 4.9 ... -
Evidence for collective multiparticle correlations in p-Pb collisions
(American Physical Society, 2015-07-03)The second-order azimuthal anisotropy Fourier harmonics, v2, are obtained in p−Pb and PbPb collisions over a wide pseudorapidity (η) range based on correlations among six or more charged particles. The p-Pb data, corresponding ... -
Evidence for collectivity in pp collisions at the LHC
(Elsevier, 2017)Measurements of two- and multi-particle angular correlations in pp collisions at View the MathML source are presented as a function of charged-particle multiplicity. The data, corresponding to integrated luminosities of ... -
Evidence for electroweak production of four charged leptons and two jets in proton-proton collisions at √s = 13 TeV
(Springer, 2021-01-10)Evidence is presented for the electroweak (EW) production of two jets (jj) in association with two Z bosons and constraints on anomalous quartic gauge couplings are set. The analysis is based on a data sample of proton-proton ... -
Evidence for exclusive γγ → W+W− production and constraints on anomalous quartic gauge couplings in pp collisions at s√=7s=7 and 8 TeV
(Springer International Publishing, 2016)A search for exclusive or quasi-exclusive γγ → W+W− production, via pp → p(*)W+W−p(*) → p(*)μ±e∓p(*) at s√=8s=8 TeV, is reported using data corresponding to an integrated luminosity of 19.7 fb−1. Events are selected by ... -
Evidence for Higgs boson decay to a pair of muons
(Springer, 2021-01-25)Evidence for Higgs boson decay to a pair of muons is presented. This result combines searches in four exclusive categories targeting the production of the Higgs boson via gluon fusion, via vector boson fusion, in association ... -
Evidence for light-by-light scattering and searches for axion-like particles in ultraperipheral PbPb collisions at √sNN = 5.02 TeV
(Elsevier, 2019-10-10)Evidence for the light-by-light scattering process, gamma gamma -> gamma gamma, in ultraperipheral PbPb collisions at a centre-of-mass energy per nucleon pair of 5.02 TeV is reported. The analysis is conducted using a data ... -
Evidence for light-by-light scattering in ultraperipheral PbPb collisions at √sNN = 5.02 TeV
(Elsevier, 2019-02)Evidence for light-by-light (LbL) scattering, gamma gamma -> gamma gamma, in ultraperipheral PbPb collisions at a nucleon-nucleon center of-mass energy of 5.02 TeV is reported. LbL scattering processes are selected in ... -
Evidence for the 125 GeV Higgs boson decaying to a pair of tau leptons
(Springer Science+Business Media, 2014-05)A search for a standard model Higgs boson decaying into a pair of tau leptons is performed using events recorded by the CMS experiment at the LHC in 2011 and 2012. The dataset corresponds to an integrated luminosity of 4.9 ... -
Evidence for the associated production of a single top quark and a photon in proton-proton collisions at √s = 13 TeV
(American Physical Society, 2018-11-29)The first evidence of events consistent with the production of a single top quark in association with a photon is reported. The analysis is based on proton-proton collisions at s=13 TeV and recorded by the CMS experiment ... -
Evidence for top quark production in nucleus-nucleus collisions
(American Physical Society, 2020-11-24)Ultrarelativistic heavy ion collisions recreate in the laboratory the thermodynamical conditions prevailing in the early universe up to 10(-6) sec, thereby allowing the study of the quark-gluon plasma (QGP), a state of ... -
Evidence for transverse-momentum- and pseudorapidity-dependent event-plane fluctuations in PbPb and p Pb collisions
(American Physical Society, 2015-09)A systematic study of the factorization of long-range azimuthal two-particle correlations into a product of single-particle anisotropies is presented as a function of pT and η of both particles and as a function of the ... -
Evidence for WW production from double-parton interactions in proton–proton collisions at s√=13TeV
(Springer Nature, 2020-01-17)A search forWWproduction from double-parton scattering processes using same-charge electron-muon and dimuon events is reported, based on proton-proton collision data collected at a center-of-mass energy of 13 TeV. The ... -
Evidence for WW/WZ vector boson scattering in the decay channel ℓνqq produced in association with two jets in proton-proton collisions at √s = 13 TeVeV
(Elsevier, 2022-11-10)Evidence is reported for electroweak (EW) vector boson scattering in the decay channel ℓνqq of two weak vector bosons WV (V=W or Z), produced in association with two parton jets. The search uses a data set of proton-proton ... -
Evidence for X(3872) in Pb-Pb collisions and studies of its prompt production at √s NN = 5.02 TeV
(American Physical Society, 2022-01-19)The first evidence for X(3872) production in relativistic heavy ion collisions is reported. The X(3872) production is studied in lead-lead (Pb-Pb) collisions at a center-of-mass energy of √ s NN = 5.02 TeV ... -
Evidence of b-Jet quenching in PbPb collisions at root S-NN=2.76 TeV
(American Physical Society, 2014-09-26)The production of jets associated to bottom quarks is measured for the first time in PbPb collisions at a center-of-mass energy of 2.76 TeV per nucleon pair. Jet spectra are reported in the transverse momentum (pT) range ... -
Experimental study of different silicon sensor options for the upgrade of the CMS Outer Tracker
(IOP Publishing, 2020-04)During the high-luminosity phase of the LHC (HL-LHC), planned to start in 2027, the accelerator is expected to deliver an instantaneous peak luminosity of up to 7.5 x 10(34) cm(-2) s(-1). A total integrated luminosity of ...
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