Now showing items 1-20 of 133

    • Azimuthal anisotropy of charged particles at high transverse momenta in Pb-Pb collisions at √s <inf>NN</inf>=2.76TeV 

      Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, H.; Vodopiyanov, Igor B.; Wolfgang, Adam; Tumasyan, A. R.; Sirunyan, A. M.; Khachatryan, Vardan; Chatrchyan, S. A. (2012-07-10)
      The azimuthal anisotropy of charged particles in Pb-Pb collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 2:76 TeV is measured with the CMS detector at the LHC over an extended transverse momentum (pT) range up to approximately 60 ...
    • Coherent J/ψ photoproduction in ultra-peripheral PbPb collisions at sNN=2.76TeV with the CMS experiment 

      Khachatryan, V.; Sirunyan, A. M.; Baarmand, Marc M.; Bhopatkar, Vallary; Colafranceschi, Stefano; Hohlmann, Marcus; Kalakhety, H.; Noonan, Daniel; Roy, Tuhin S.; Yumiceva, F. (2017-09-10)
      The cross section for coherent J/ψ photoproduction accompanied by at least one neutron on one side of the interaction point and no neutron activity on the other side, Xn0n, is measured with the CMS experiment in ultra-peripheral ...
    • Combined measurement of the higgs boson mass in pp collisions at √s =7 and 8 TeV with the ATLAS and CMS experiments 

      Hohlmann, Marcus; Bhopatkar, Vallary; Kalakhety, H.; Mareskas-palcek, Darren; Roy, Tuhin S.; Yumiceva, Francisco X.; Aad, G.; Abbott, B.; Abdinov, O. B. (2015-05-14)
      A measurement of the Higgs boson mass is presented based on the combined data samples of the ATLAS and CMS experiments at the CERN LHC in the H→γγ and H→ZZ→4 decay channels. The results are obtained from a simultaneous fit ...
    • Combined search for anomalous pseudoscalar HVV couplings in VH(H→bb‾) production and H → VV decay 

      Khachatryan, V.; Sirunyan, A.M.; Baarmand, M.M.; Hohlmann, Marcus; Colafranceschi, Stefano; Bhopatkar, Vallary; Noonan, D.; Roy, Tuhin S.; Yumiceva, Francisco X.; Kalakhety, H. (2016-08-10)
      A search for anomalous pseudoscalar couplings of the Higgs boson H to electroweak vector bosons V (=W or Z) in a sample of proton–proton collision events corresponding to an integrated luminosity of 18.9 fb−1 at a ...
    • Determination of the top-quark pole mass and strong coupling constant from the tt̄ production cross section in pp collisions at √s = 7 TeV 

      Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, H.; Yumiceva, Francisco X.; Chatrchyan, S. A.; Khachatryan, Vardan; Sirunyan, A. M.; Tumasyan, A. R.; Adam, Wolfgang (2014-01-20)
      The inclusive cross section for top-quark pair production measured by the CMS experiment in proton-proton collisions at a center-of-mass energy of 7 TeV is compared to the QCD prediction at next-to-next-to-leading order ...
    • Differential cross section measurements for the production of a W boson in association with jets in proton-proton collisions at √s = 7 TeV 

      Baarmand, Marc M.; Hohlmann, Marcus; Kalakhety, H.; Yumiceva, Francisco X.; Khachatryan, Vardan; Sirunyan, A. M.; Tumasyan, A. R.; Adam, Wolfgang; Bergauer, Thomas; Dragicevic, Marko (2014-12-05)
      Measurements are reported of differential cross sections for the production of a W boson, which decays into a muon and a neutrino, in association with jets, as a function of several variables, including the transverse ...
    • Dijet azimuthal decorrelations in pp collisions at √s=7TeV 

      Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Baarmand, Marc M.; Dorney, B.; Guragain, Samir; Hohlmann, Marcus; Kalakhety, H.; Ralich, Robert M.; Vodopiyanov, Igor B. (2011-03-22)
      Measurements of dijet azimuthal decorrelations in pp collisions at √s=7TeV using the CMS detector at the CERN LHC are presented. The analysis is based on an inclusive dijet event sample corresponding to an integrated ...
    • Event activity dependence of υ(nS) production in √SNN = 5.02 TeV pPb and √s = 2.76 TeV pp collisions 

      Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, H.; Yumiceva, Francisco X.; Chatrchyan, S. A.; Khachatryan, Vladimir A.; Sirunyan, A. M.; Tumasyan, A. R.; Adam, Wolfgang (2014-04-15)
      The production of υ(1S), υ(2S), and υ(3S) is investigated in pPb and pp collisions at centre-of-mass energies per nucleon pair of 5.02 TeV and 2.76 TeV, respectively. The datasets correspond to integrated luminosities of ...
    • Evidence for Collective Multiparticle Correlations in p-Pb Collisions 

      Baarmand, Marc M.; Hohlmann, Marcus; Kalakhety, H.; Yumiceva, Francisco X.; Khachatryan, Vardan (2015-06-29)
      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 the 125 gev higgs boson decaying to a pair of τ leptons 

      Chatrchyan, S. A.; Khachatryan, Vardan; Sirunyan, A. M.; Tumasyan, A. R.; Adam, Wolfgang; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, H.; Yumiceva, Francisco X. (2014-05)
      A search for a standard model Higgs boson decaying into a pair of τ 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 125 GeV Higgs boson decaying to a pair of τ leptons 

      Chatrchyan, S. A.; Khachatryan, Vardan; Sirunyan, A. M.; Tumasyan, A. R.; Adam, Wolfgang; Baarmand, Marc M.; Hohlmann, Marcus; Kalakhety, H.; Yumiceva, Francisco X.; Bergauer, Thomas (2014-05)
      A search for a standard model Higgs boson decaying into a pair of τ 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 transverse-momentum- and pseudorapidity-dependent event-plane fluctuations in PbPb and p Pb collisions 

      Khachatryan, Vardan; Sirunyan, A. M.; Tumasyan, A. R.; Adam, Wolfgang; Bhopatkar, Vallary; Hohlmann, Marcus; Kalakhety, H.; Mareskas-Palcek, D.; Roy, Tuhin S.; Yumiceva, Francisco X. (2015-09-22)
      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 sNN =2.76TeV 

      Chatrchyan, S. A.; Vardan, Khachatryan; Sirunyan, A. M.; Tumasyan, A. R.; Wolfgang, Adam; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, H.; Yumiceva, Francisco X. (2014-09-22)
      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 ...
    • First measurement of Bose-Einstein correlations in proton-proton collisions at √s=0.9 and 2.36 TeV at the LHC 

      Khachatryan, Vardan; Sirunyan, A. M.; Tumasyan, A. R.; Baarmand, Marc M.; Guragain, Samir; Hohlmann, Marcus; Kalakhety, H.; Mermerkaya, H.; Ralich, Robert M.; Vodopiyanov, Igor (2010-07-13)
      Bose-Einstein correlations have been measured using samples of proton-proton collisions at 0.9 and 2.36 TeV center-of-mass energies, recorded by the CMS experiment at the CERN Large Hadron Collider. The signal is observed ...
    • Identification techniques for highly boosted W bosons that decay into hadrons 

      Baarmand, Marc M.; Hohlmann, Marcus; Kalakhety, H.; Yumiceva, Francisco X.; The CMS Collaboration; Khachatryan, Vardan; Sirunyan, A. M.; Tumasyan, A. R.; Adam, Wolfgang; Bergauer, Thomas (2014-12-02)
      In searches for new physics in the energy regime of the LHC, it is becoming increasingly important to distinguish single-jet objects that originate from the merging of the decay products of W bosons produced with high ...
    • Inclusive and differential measurements of the tt charge asymmetry in pp collisions at √s=8 TeV 

      Khachatryan, V.; Sirunyan, A.M.; Tumasyan, A.; Baarmand, M.M.; Bhopatkar, Vallary; Hohlmann, Marcus; Roy, Tuhin S.; Yumiceva, Francisco X.; Mareskas-palcek, D.; Kalakhety, H. (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 ...
    • Indications of suppression of excited? States in Pb-Pb collisions at sNN2.76 TeV 

      Chatrchyan, S. A.; Khachatryan, Vardan; Sirunyan, A. M.; Baarmand, Marc M.; Dorney, B.; Guragain, Samir; Hohlmann, Marcus; Kalakhety, H.; Ralich, Robert M.; Vodopiyanov, Igor B. (2011-07-28)
      A comparison of the relative yields of resonances in the þ decay channel in Pb-Pb and pp collisions at a center-of-mass energy per nucleon pair of 2.76 TeV is performed with data collected with the CMS detector at ...
    • Measurement of dijet angular distributions and search for quark compositeness in pp collisions at √s=7TeV 

      Khachatryan, Vardan; Sirunyan, A. M.; Bergauer, Thomas; Baarmand, Marc M.; Hohlmann, Marcus; Kalakhety, H.; Ralich, Robert M.; Vodopiyanov, Igor B.; Dorney, B.; Guragain, S. (2011-05-18)
      Dijet angular distributions are measured over a wide range of dijet invariant masses in pp collisions at ffiffi s p ¼ 7 TeV, at the CERN LHC. The event sample, recorded with the CMS detector, corresponds to an integrated ...
    • Measurement of four-jet production in proton-proton collisions at s =7TeV 

      Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, H.; Yumiceva, Francisco X.; Chatrchyan, S. A.; Khachatryan, Vladimir A.; Sirunyan, A. M.; Tumasyan, A. R.; Adam, Wolfgang (2014-05-28)
      Measurements of the differential cross sections for the production of exactly four jets in proton-proton collisions are presented as a function of the transverse momentum pT and pseudorapidity η, together with the correlations ...
    • Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states 

      Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, H.; Yumiceva, Francisco X.; Chatrchyan, S. A.; Khachatryan, Vladimir A.; Sirunyan, A. M.; Tumasyan, A. R.; Adam, Wolfgang (2014-01-17)
      A search for the standard model Higgs boson decaying to a W-boson pair at the LHC is reported. The event sample corresponds to an integrated luminosity of 4.9 fb-1 and 19.4 fb-1 collected with the CMS detector in pp ...