Inclusive and differential measurements of the t t-bar charge asymmetry in proton-proton collisions at 7 TeV

Abstract : The t t-bar charge asymmetry is measured in events containing a charged lepton (electron or muon) and at least four jets, one of which is identified as originating from b-quark hadronization. The analyzed dataset corresponds to an integrated luminosity of 5.0 inverse femtobarns collected with the CMS detector at the LHC. An inclusive and three differential measurements of the t t-bar charge asymmetry as a function of rapidity, transverse momentum, and invariant mass of the t t-bar system are presented. The measured inclusive t t-bar charge asymmetry is A(C) = 0.004 +/- 0.010 (stat.) +/- 0.011 (syst.). This result and the three differential measurements are consistent with zero asymmetry as well as with the predictions of the standard model.
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http://hal.in2p3.fr/in2p3-00713884
Contributor : Sylvie Flores <>
Submitted on : Tuesday, July 3, 2012 - 7:17:31 AM
Last modification on : Monday, February 10, 2020 - 6:13:07 PM

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S. Chatrchyan, M. Besancon, S. Choudhury, M. Dejardin, D. Denegri, et al.. Inclusive and differential measurements of the t t-bar charge asymmetry in proton-proton collisions at 7 TeV. Physics Letters B, Elsevier, 2012, 717, pp.129-150. ⟨10.1016/j.physletb.2012.09.028⟩. ⟨in2p3-00713884⟩

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