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

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

This paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair (t[¯ over t]) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at centre-of-mass energies of 7 and 8 TeV....

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Bibliographic Details
Main Authors: Abercrombie, Daniel Robert, Allen, Brandon Leigh, Azzolini, Virginia, Barbieri, Richard Alexander, Baty, Austin Alan, Bauer, Gerry P, Bi, Ran, Brandt, Stephanie Akemi, Busza, Wit, Cali, Ivan Amos, D'Alfonso, Mariarosaria, Demiragli, Zeynep, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Hsu, Dylan George, Hu, Miao, Iiyama, Yutaro, Innocenti, Gian Michele, Klute, Markus, Kovalskyi, Dmytro, Lee, Yen-Jie, Levin, Andrew Michael, Luckey Jr, P David, Maier, Benedikt, Marini, Andrea Carlo, McGinn, Christopher Francis, Mironov, Camelia Maria, Narayanan, Siddharth Madhavan, Niu, Xinmei, Paus, Christoph M. E., Roland, Christof E, Roland, Gunther M, Salfeld-Nebgen, Jakob Maxillian Henry, Stephans, George S. F., Sumorok, Konstanty C, Tatar, Kaya, Velicanu, Dragos Alexandru, Wajng, J., Wang, Ta-Wei, Wyslouch, Boleslaw
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Published: Springer Nature 2018
Online Access:http://hdl.handle.net/1721.1/119143
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Description
Summary:This paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair (t[¯ over t]) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. The data correspond to integrated luminosities of about 5 and 20 fb[superscript −1] for each experiment, respectively. The resulting combined LHC measurements of the inclusive charge asymmetry are A[subscript C][superscript CHC7]  = 0.005 ± 0.007 (stat) ± 0.006(syst) at 7 TeV and A[subscript C][superscript CHC8]  = 0.0055 ± 0.0023 (stat) ± 0.0025 (syst) at 8 TeV. These values, as well as the combination of AC measurements as a function of the invariant mass of the t[¯ over t] system at 8 TeV, are consistent with the respective standard model predictions. Keywords: Hadron-Hadron scattering (experiments), Top physics

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