Now showing items 1-20 of 138

    • Angular coefficients of Z bosons produced in pp collisions at √s=8 TeV and decaying to μ+μ- as a function of transverse momentum and rapidity 

      Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Bergauer, Thomas; Dragicevic, Marko; Baarmand, Marc M.; Hohlmann, Marcus; Kalakhety, Himali; Yumiceva, Francisco (2015-11-15)
      Measurements of the five most significant angular coefficients, A0 through A4, for Z bosons produced in pp collisions at √s=8 TeV and decaying to μ+μ- are presented as a function of the transverse momentum and rapidity of ...
    • Charged particle multiplicities in pp interactions at √s = 0.9, 2.36, and 7 TeV 

      Khachatryan, S.; Sirunyan, A.M.; Tumasyan, A.R.; Baarmand, Marc M.; Dorney, B.; Guragain, Samir; Hohlmann, Marcus; Kalakhety, Himali; Ralich, Robert M.; Vodopiyanov, Igor (2011-01-19)
      Measurements of primary charged hadron multiplicity distributions are presented for non-single-diffractive events in proton-proton collisions at centre-of-mass energies of √s = 0.9, 2.36, and 7 TeV, in five pseudorapidity ...
    • Comparison of the Z/γ ∗ + jets to γ + jets cross sections in pp collisions at √s = 8 TeV 

      Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Bhopatkar, Vardan; Hohlmann, Marcus; Kalakhety, Himali; Mareskas-palcek, Darren; Roy, Tuhin S.; Yumiceva, Francisco (2015-10-20)
      A comparison of the differential cross sections for the processes Z/γ * + jets and photon (γ)+jets is presented. The measurements are based on data collected with the CMS detector at √s = 8 TeV corresponding to an integrated ...
    • Erratum to: Comparison of the Z/γ* + jets to γ + jets cross sections in pp collisions at √s = 8 (JHEP, (2015), 10, 128) 

      Khachatryan, Vallary; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Bhopatkarv, Vallary; Hohlmann, Marcus; Kalakhety, Himali; Mareskas-palcek, Darren; Roy, Tuhin S.; Yumiceva, Francisco (2016-04-04)
      An error was found in the published version in the top right plots in figure 2 and figure 3. In both cases the normalization of the photon plots is incorrect by the factor of the luminosity of 19.7. The corrected figures ...
    • Erratum to: Search for new physics in events with same-sign dileptons and jets in pp collisions at √s = 8 TeV 

      Chatrchyan, S.A.; Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Yumiceva, Francisco (2015-01-07)
      Erratum to: JHEP01(2014)163. The online version of the original article can be found at http://dx.doi.org/10.1007/JHEP01(2014)16
    • Event activity dependence of Υ(nS) production in √SNN = 5.02 TeV pPb and √s = 2.76 TeV pp collisions 

      Chatrchyan, S.A.; Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Yumiceva, Francisco (2014-04-15)
      The production of Y (1S), Y (2S), and Y (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 ...
    • Evidence for associated production of a single top quark and W Boson in pp collisions at √s=7 TeV 

      Chatrchyan, S.A.; Khachatryan, Vladimir A.; Sirunyan, A.M.; Tumasyan, A.R.; Adam, W.; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Vodopiyanov, Igor (2013-01-11)
      Evidence is presented for the associated production of a single top quark and W boson in pp collisions at √s=7 TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 4.9 fb -1. ...
    • Exclusive γγ → +μμ - production in proton-proton collisions at √s = 7 TeV 

      Chatrchyan, S.; Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Vodopiyanov, Igor (2012-01-11)
      A measurement of the exclusive two-photon production of muon pairs in proton-proton collisions at √s = 7 TeV, pp → pμ+μ−p, is reported using data corresponding to an integrated luminosity of 40 pb−1. For muon pairs with ...
    • Identification techniques for highly boosted W bosons that decay into hadrons 

      Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Bergauer, Thomas; Dragicevic, Marko; Baarmand, Marc M.; Hohlmann, Marcus; Kalakhety, Himali; Yumiceva, Francisco (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 b-hadron production cross section with muons in pp collisions at √s = 7 TeV 

      Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Baarmand, Marc M.; Dorney, B.; Guragain, Samir; Hohlmann, Marcus; Kalakhety, Himali; Ralich, Robert M.; Vodopiyanov, Igor (2011-03-18)
      A measurement of the b-hadron production cross section in proton-proton collisions at √s = 7TeV is presented. The dataset, corresponding to 85 nb−1, was recorded with the CMS experiment at the LHC using a low-threshold ...
    • Inclusive b-jet production in pp collisions at √s = 7 TeV 

      Chatrchyan, S.; Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Vodopiyanov, Igor (2012-04-17)
      The inclusive b-jet production cross section in pp collisions at a center-of mass energy of 7 TeV is measured using data collected by the CMS experiment at the LHC. The cross section is presented as a function of the jet ...
    • Inclusive search for a vector-like T quark with charge 2/3 in pp collisions at √s=8 TeV 

      Chatrchyan, S.A.; Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Yumiceva, Francisco (2014-02-05)
      A search is performed for a massive new vector-like quark T, with charge 2 3 , that is pair produced together with its antiparticle in proton–proton collisions. The data were collected by the CMS experiment at the Large ...
    • Inclusive search for supersymmetry using razor variables in pp collisions at √s=7 TeV 

      Chatrchyan, S.A.; Khachatryan, Vladimir A.; Sirunyan, A.M.; Tumasyan, A.R.; Adam, W.; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Vodopiyanov, Igor (2013-08-23)
      An inclusive search is presented for new heavy particle pairs produced in √s=7 TeV proton-proton collisions at the LHC using 4.7±0.1 fb -1 of integrated luminosity. The selected events are analyzed in the 2D razor space ...
    • Interpretation of searches for supersymmetry with simplified models 

      Chatrchyan, S.A.; Khachatryan, Vladimir A.; Sirunyan, A.M.; Tumasyan, A.R.; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Vodopiyanov, Igor; Yumiceva, Francisco (2013-09-23)
      The results of searches for supersymmetry by the CMS experiment are interpreted in the framework of simplified models. The results are based on data corresponding to an integrated luminosity of 4.73 to 4.98 fb-1. The data ...
    • J/ψ and ψ (2S) production in pp collisions at √s = 7 TeV 

      Chatrchyan, S.; Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Vodopiyanov, Igor (2012-02-07)
      A measurement of the J/ψ and ψ(2S) production cross sections in pp collisions at √s = 7TeV with the CMS experiment at the LHC is presented. The data sample corresponds to an integrated luminosity of 37 pb−1. Using a fit ...
    • Jet production rates in association with W and Z bosons in pp collisions at √s = 7 TeV 

      Chatrchyan, S.; Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Vodopiyanov, Igor (2012-01-03)
      Measurements of jet production rates in association with W and Z bosons for jet transverse momenta above 30 GeV are reported, using a sample of proton-proton collision events recorded by CMS at √s = 7TeV , corresponding ...
    • Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies 

      Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, W.; Bergauer, T.; Dragicevic, M.; Baarmand, Marc M.; Hohlmann, Marcus; Kalakhety, Himali; Yumiceva, Francisco (2015-03-06)
      Measurements of two-particle angular correlations between an identified strange hadron (K0 S or Λ/Λ) and a charged particle, emitted in pPb collisions, are presented over a wide range in pseudorapidity and full azimuth. ...
    • Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at √s=7 TeV 

      Chatrchyan, S.A.; Khachatryan, Vladimir A.; Sirunyan, A.M.; Tumasyan, A.R.; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Vodopiyanov, Igor; Yumiceva, Francisco (2013-04-25)
      The first measurement of vector-boson production associated with a top quark-antiquark pair in proton-proton collisions at √s=7 TeV is presented. The results are based on a data set corresponding to an integrated luminosity ...
    • Measurement of BB̄ angular correlations based on secondary vertex reconstruction at √s = 7 TeV 

      Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Baarmand, Marc M.; Dorney, B.; Guragain, Samir; Hohlmann, Marcus; Kalakhety, Himali; Ralich, Robert M.; Vodopiyanov, Igor (2011-03-28)
      A measurement of the angular correlations between beauty and anti-beauty hadrons (BB¯) produced in pp collisions at a centre-of-mass energy of 7 TeV at the CERN LHC is presented, probing for the first time the region of ...
    • Measurement of jet fragmentation into charged particles in pp and PbPb collisions at √s NN = 2:76 TeV 

      Chatrchyan, S.; Khachatryan, Vardan; Sirunyan, A.M.; Tumasyan, A.R.; Adam, Wolfgang; Baarmand, Marc M.; Dorney, B.; Hohlmann, Marcus; Kalakhety, Himali; Vodopiyanov, Igor (2012-10-12)
      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 ...