# Inclusive and differential measurements of the t t-bar charge asymmetry in pp collisions at sqrt(s) = 8 TeV

Abstract : The t t-bar 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 inverse femtobarns. Selected events contain an electron or a muon and four or more jets, where at least one jet is identified as originating from b-quark hadronization. The inclusive charge asymmetry is found to be 0.0010 +/- 0.0068 (stat) +/- 0.0037 (syst). In addition, differential charge asymmetries as a function of rapidity, transverse momentum, and invariant mass of the t t-bar system are studied. For the first time at the LHC, the measurements are also performed in a reduced fiducial phase space of top quark pair production, with an integrated result of -0.0035 +/- 0.0072 (stat) +/- 0.0031 (syst). All measurements are consistent within two standard deviations with zero asymmetry as well as with the predictions of the standard model.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-01334137
Contributor : Dominique Girod <>
Submitted on : Monday, June 20, 2016 - 2:43:53 PM
Last modification on : Wednesday, July 17, 2019 - 9:06:16 AM

### Citation

V. Khachatryan, M. Besancon, F. Couderc, M. Dejardin, D. Denegri, et al.. Inclusive and differential measurements of the t t-bar charge asymmetry in pp collisions at sqrt(s) = 8 TeV. Physics Letters B, Elsevier, 2016, 757, pp.154-179. ⟨10.1016/j.physletb.2016.03.060⟩. ⟨in2p3-01334137⟩

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