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Combination of inclusive and differential tt¯ charge asymmetry measurements using ATLAS and CMS data at √s = 7 and 8 TeV

  • Author(s): Sirunyan, AM;
  • Tumasyan, A;
  • Adam, W;
  • Ambrogi, F;
  • Asilar, E;
  • Bergauer, T;
  • Brandstetter, J;
  • Brondolin, E;
  • Dragicevic, M;
  • Erö, J;
  • Escalante Del Valle, A;
  • Flechl, M;
  • Friedl, M;
  • Frühwirth, R;
  • Ghete, VM;
  • Grossmann, J;
  • Hrubec, J;
  • Jeitler, M;
  • König, A;
  • Krammer, N;
  • Krätschmer, I;
  • Liko, D;
  • Madlener, T;
  • Mikulec, I;
  • Pree, E;
  • Rad, N;
  • Rohringer, H;
  • Schieck, J;
  • Schöfbeck, R;
  • Spanring, M;
  • Spitzbart, D;
  • Taurok, A;
  • Waltenberger, W;
  • Wittmann, J;
  • Wulz, CE;
  • Zarucki, M;
  • Chekhovsky, V;
  • Mossolov, V;
  • Suarez Gonzalez, J;
  • De Wolf, EA;
  • Di Croce, D;
  • Janssen, X;
  • Lauwers, J;
  • Van De Klundert, M;
  • Van Haevermaet, H;
  • Van Mechelen, P;
  • Van Remortel, N;
  • Abu Zeid, S;
  • Blekman, F;
  • D’hondt, J;
  • De Bruyn, I;
  • De Clercq, J;
  • Deroover, K;
  • Flouris, G;
  • Lontkovskyi, D;
  • Lowette, S;
  • Marchesini, I;
  • Moortgat, S;
  • Moreels, L;
  • Python, Q;
  • Skovpen, K;
  • Tavernier, S;
  • Van Doninck, W;
  • Van Mulders, P;
  • Van Parijs, I;
  • Beghin, D;
  • Bilin, B;
  • Brun, H;
  • Clerbaux, B;
  • De Lentdecker, G;
  • Delannoy, H;
  • Dorney, B;
  • Fasanella, G;
  • Favart, L;
  • Goldouzian, R;
  • Grebenyuk, A;
  • Kalsi, AK;
  • Lenzi, T;
  • Luetic, J;
  • Maerschalk, T;
  • Marinov, A;
  • Seva, T;
  • Starling, E;
  • Vander Velde, C;
  • Vanlaer, P;
  • Vannerom, D;
  • Yonamine, R;
  • Zenoni, F;
  • Cornelis, T;
  • Dobur, D;
  • Fagot, A;
  • Gul, M;
  • Khvastunov, I;
  • Poyraz, D;
  • Roskas, C;
  • Salva, S;
  • Tytgat, M;
  • Verbeke, W;
  • Zaganidis, N;
  • Bakhshiansohi, H
  • et al.
Abstract

This paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair (tt) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at centreof- mass energies of 7 and 8TeV. The data correspond to integrated luminosities of about 5 and 20 fb–1for each experiment, respectively. The resulting combined LHC measurements of the inclusive charge asymmetry are ACLHC7= 0:005±0:007 (stat) ±0:006 (syst) at 7TeV and ACLHC7= 0:0055 ± 0:0023 (stat) ± 0:0025 (syst) at 8TeV. These values, as well as the combination of AC measurements as a function of the invariant mass of the [formula presented] system at 8TeV, are consistent with the respective standard model predictions.

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