Browsing by Author "Khachatryan, V."
Now showing items 61-80 of 233
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Measurement of the mass of the top quark in decays with a J/ψ meson in pp collisions at 8 TeV
Khachatryan, V.; Işıldak, Bora (Springer Nature, 2016)A first measurement of the top quark mass in the decay channel t → (W → ℓν) (b → J/ψ + X → μ+μ− + X) is presented. The analysis uses events selected from the proton-proton collisions recorded by the CMS detector at the LHC ... -
Measurement of the pp -> ZZ production cross section and constraints on anomalous triple gauge couplings in four-lepton final states at root s=8 TeV
Khachatryan, V.; Işıldak, Bora (Elsevier, 2015-01-05)A measurement of the inclusive ZZ production cross section and constraints on anomalous triple gauge couplings in proton–proton collisions at source are presented. The analysis is based on a data sample, corresponding to ... -
Measurement of the production cross section of a W boson in association with two b jets in pp collisions at root s=8TeV
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2017)The production cross section of a W boson in association with two b jets is measured using a sample of proton-proton collisions at root s = 8 TeV collected by the CMS experiment at the CERN LHC. The data sample corresponds ... -
Measurement of the production cross section ratio σ(χ<inf>b2</inf>(1P))/σ(χ<inf>b1</inf>(1P)) in pp collisions at s=8TeV
Khachatryan, V.; Işıldak, Bora (Elsevier, 2015-04-09)A measurement of the production cross section ratio σ(χb2(1P))/σ(χb1(1P)) is presented. The χb1(1P) and χb2(1P) bottomonium states, promptly produced in pp collisions at View the MathML source, are detected by the CMS ... -
Measurement of the ratio B(B<inf>s</inf>0 → J/ψf<inf>0</inf>(980))/B(B<inf>s</inf>0 → J/ψφ(1020)) in pp collisions at √s=7 TeV
Khachatryan, V.; Işıldak, Bora (Elsevier, 2016-05-10)A measurement of the ratio of the branching fractions of the Bs0 meson to J/ψf0(980) and to J/ψφ(1020) is presented. The J/ψ, f0(980), and φ(1020) are observed through their decays to μ+μ-, π+π-, and K+K-, respectively. ... -
Measurement of the t t ¯ production cross section in the eμ channel in proton-proton collisions at √s = 7 and 8 TeV
Khachatryan, V.; Işıldak, Bora (Springer Nature, 2016-08)The inclusive cross section for top quark pair production is measured in proton-proton collisions at s√=7s=7 and 8 TeV, corresponding to 5.0 and 19.7 fb−1, respectively, with the CMS experiment at the LHC. The cross ... -
Measurement of the t(t)over-bar production cross section using events in the e mu final state in pp collisions at root s=13 TeV
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2017)The cross section of top quark-antiquark pair production in proton-proton collisions at root s = 13 TeV is measured by the CMS experiment at the LHC, using data corresponding to an integrated luminosity of 2.2 fb(-1). The ... -
Measurement of the top quark mass using charged particles in pp collisions at s =8 TeV
Khachatryan, V.; Işıldak, Bora (American Physical Society, 2016-05-01)A novel technique for measuring the mass of the top quark that uses only the kinematic properties of its charged decay products is presented. Top quark pair events with final states with one or two charged leptons and ... -
Measurement of the top quark mass using proton-proton data at (s)=7 and 8 TeV
Khachatryan, V.; Işıldak, Bora (American Physical Society, 2016-04-01)A new set of measurements of the top quark mass are presented, based on the proton-proton data recorded by the CMS experiment at the LHC at s√=8 TeV corresponding to a luminosity of 19.7 fb−1. The top quark mass is ... -
Measurement of the top quark pair production cross section in proton-proton collisions at s =13 TeV
Khachatryan, V.; Işıldak, Bora (American Physical Society, 2016-02-05)The top quark pair production cross section is measured for the first time in proton-proton collisions at s√=13 TeV by the CMS experiment at the CERN LHC, using data corresponding to an integrated luminosity of 43 pb−1. ... -
Measurement of the transverse momentum spectra of weak vector bosons produced in proton-proton collisions at root s=8TeV
Khachatryan, V.; Işıldak, Bora (Springer International, 2017)The transverse momentum spectra of weak vector bosons are measured in the CMS experiment at the LHC. The measurement uses a sample of proton-proton collisions at s√=8s=8 TeV, collected during a special low-luminosity ... -
Measurement of the transverse momentum spectrum of the Higgs boson produced in pp collisions at √s=8 TeV using H → WW decays
Khachatryan, V.; Işıldak, Bora (Springer Nature, 2017-03)The cross section for Higgs boson production in pp collisions is studied using the H → W+W− decay mode, followed by leptonic decays of the W bosons to an oppositely charged electron-muon pair in the final state. The ... -
Measurement of the tt production cross section in pp collisions at √s=8 TeV in dilepton final states containing one τ lepton
Khachatryan, V.; Işıldak, Bora (Elsevier, 2014-12-12)The top-quark pair production cross section is measured in final states with one electron or muon and one hadronically decaying τ lepton from the process View the MathML source, where ℓ=e,μ. The data sample corresponds ... -
Measurement of the tt¯ production cross section in the all-jets final state in pp collisions at √s = 8 TeV
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2016-03)The cross section for tt¯tt¯ production in the all-jets final state is measured in pp collisions at a centre-of-mass energy of 8 TeVTeV at the LHC with the CMS detector, in data corresponding to an integrated luminosity ... -
Measurement of the underlying event activity using charged-particle jets in proton-proton collisions at √s=2.76 TeV
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2015-09)A measurement of the underlying event (UE) activity in proton-proton collisions is performed using events with charged-particle jets produced in the central pseudorapidity region (|η jet| < 2) and with transverse momentum ... -
Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton plus jets final states produced in pp collisions at root s=8 TeV
Khachatryan, V.; Işıldak, Bora (Elsevier, 2016)The W boson helicity fractions from top quark decays in t (t) over bar events are measured using data from proton-proton collisions at a centre-of-mass energy of 8 TeV. The data were collected in 2012 with the CMS detector ... -
Measurement of the W boson helicity in events with a single reconstructed top quark in pp collisions at √s = 8 TeV
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2015-01)A measurement of the W boson helicity is presented, where the W boson originates from the decay of a top quark produced in pp collisions. The event selection, optimized for reconstructing a single top quark in the final ... -
Measurement of the W+W- cross section in pp collisions at root s=8 TeV and limits on anomalous gauge couplings
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2016-07)A measurement of the W boson pair production cross section in proton-proton collisions at root s = 8TeV is presented. The data collected with the CMS detector at the LHC correspond to an integrated luminosity of 19.4 fb(-1). ... -
Measurement of the WZ production cross section in pp collisions at root s=7 and 8 TeV and search for anomalous triple gauge couplings at root s=8 TeV
Khachatryan, V.; Işıldak, Bora (Springer International Publishing, 2017)The WZ production cross section is measured by the CMS experiment at the CERN LHC in proton proton collision data samples corresponding to integrated luminosities of 4.9 fb(-1) collected at root s = 7 TeV, and 19.6fb(-1) ... -
Measurement of the Z boson differential cross section in transverse momentum and rapidity in proton-proton collisions at 8 TeV
Khachatryan, V.; Işıldak, Bora (Elsevier, 2015-10-07)We present a measurement of the Z boson differential cross section in rapidity and transverse momentum using a data sample of pp collision events at a centre-of-mass energy View the MathML source, corresponding to an ...
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