Browsing by Author "Khachatryan, V."
Now showing items 21-40 of 233
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Erratum: Search for the associated production of the Higgs boson with a top-quark pair
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2014-10) -
Event generator tunes obtained from underlying event and multiparton scattering measurements
Khachatryan, V.; Işıldak, Bora (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 ... -
Evidence for collective multiparticle correlations in p-Pb collisions
Khachatryan, V.; Işıldak, Bora (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
Khachatryan, V.; Işıldak, Bora (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 exclusive γγ → W+W− production and constraints on anomalous quartic gauge couplings in pp collisions at s√=7s=7 and 8 TeV
Khachatryan, V.; Işıldak, Bora (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 transverse-momentum- and pseudorapidity-dependent event-plane fluctuations in PbPb and p Pb collisions
Khachatryan, V.; Işıldak, Bora (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 of b-Jet quenching in PbPb collisions at root S-NN=2.76 TeV
Khachatryan, V.; Işıldak, Bora (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 ... -
Identification techniques for highly boosted W bosons that decay into hadrons
Khachatryan, V.; Işıldak, Bora (Springer Nature, 2014-10)A search for neutral Higgs bosons in the minimal supersymmetric extension of the standard model (MSSM) decaying to tau-lepton pairs in pp collisions is performed, using events recorded by the CMS experiment at the LHC. The ... -
Inclusive and differential measurements of the tt charge asymmetry in pp collisions at √s=8 TeV
Khachatryan, V.; Işıldak, Bora (Elsevier, 2016-06-10)The tt charge asymmetry is measured in proton–proton collisions at a centre-of-mass energy of 8 TeV. The data, collected with the CMS experiment at the LHC, correspond to an integrated luminosity of 19.7 fb−1. Selected ... -
Inclusive search for supersymmetry using razor variables in pp collisions at √s=13 TeV
Khachatryan, V.; Işıldak, Bora (American Physical Society, 2017-01-06)An inclusive search for supersymmetry using razor variables is performed in events with four or more jets and no more than one lepton. The results are based on a sample of proton-proton collisions corresponding to an ... -
Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
Khachatryan, V.; Işıldak, Bora (IOP , 2017)Improved jet energy scale corrections, based on a data sample corresponding to an integrated luminosity of 19.7 fb-1 collected by the CMS experiment in proton-proton collisions at a center-of-mass energy of 8 TeV, are ... -
Limits on the Higgs boson lifetime and width from its decay to four charged leptons
Khachatryan, V.; Işıldak, Bora (American Physical Society, 2015-10-01)Constraints on the lifetime and width of the Higgs boson are obtained from H→ZZ→4ℓ events using data recorded by the CMS experiment during the LHC run 1 with an integrated luminosity of 5.1 and 19.7 fb−1 at a center-of-mass ... -
Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies
Khachatryan, V.; Işıldak, Bora (Elsevier, 2015-03-06)Measurements of two-particle angular correlations between an identified strange hadron (View the MathML source or View the MathML source) and a charged particle, emitted in pPb collisions, are presented over a wide range ... -
Measurement and QCD analysis of double-differential inclusive jet cross sections in pp collisions at root s=8 TeV and cross section ratios to 2.76 and 7 TeV
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2017)A measurement of the double-differential inclusive jet cross section as a function of the jet transverse momentum pT and the absolute jet rapidity |y| is presented. Data from LHC proton-proton collisions at s√=8s=8 TeV, ... -
Measurement of differential and integrated fiducial cross sections for Higgs boson production in the four-lepton decay channel in pp collisions at √s = 7 and 8 TeV
Khachatryan, V.; Işıldak, Bora (2016-04)Integrated fiducial cross sections for the production of four leptons via the H → 4ℓ decays (ℓ = e, μ) are measured in pp collisions at s√=7s=7 and 8TeV. Measurements are performed with data corresponding to integrated ... -
Measurement of differential cross sections for Higgs boson production in the diphoton decay channel in pp collisions at √s = 8 TeV
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2016-01)A measurement is presented of differential cross sections for Higgs boson (H) production in pp collisions at s√=8s=8 TeVTeV . The analysis exploits the H→γγH→γγ decay in data corresponding to an integrated luminosity ... -
Measurement of differential cross sections for top quark pair production using the lepton plus jets final state in proton-proton collisions at 13 TeV
Khachatryan, V.; Işıldak, Bora (American Physical Society, 2017)Differential and double-differential cross sections for the production of top quark pairs in proton-proton collisions at 13 TeV are measured as a function of jet multiplicity and of kinematic variables of the top quarks ... -
Measurement of diffractive dissociation cross sections in pp collisions at root s=7 TeV
Khachatryan, V.; Işıldak, Bora (American Physical Society, 2015-07-01)Measurements of diffractive dissociation cross sections in pp collisions at s√=7 TeV are presented in kinematic regions defined by the masses MX and MY of the two final-state hadronic systems separated by the largest ... -
Measurement of dijet azimuthal decorrelation in pp collisions at root s=8 TeV
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2016)A measurement of the decorrelation of azimuthal angles between the two jets with the largest transverse momenta is presented for seven regions of leading jet transverse momentum up to 2.2. The analysis is based on the ... -
Measurement of electroweak production of a W boson and two forward jets in proton-proton collisions at root s=8 TeV
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2016)A measurement is presented of the cross section for the electroweak production of a W boson in association with two jets in proton-proton collisions at a center-of-mass energy of 8 TeV. The data set was collected with the ...
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