Inclusive and differential measurements of the t t-bar charge asymmetry in proton-proton collisions at 7 TeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physics Letters B Year : 2012

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

S. Chatrchyan
  • Function : Author
R. Granier de Cassagnac
C. Mironov
P. Paganini
J.-L. Agram
C. Collard
E. Conte
P. van Hove
S. Beauceron
  • Function : Author
CMS
D. Contardo
M. Gouzevitch
M. Lethuillier
V. Sordini
P. Verdier
S. Viret

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.

Dates and versions

in2p3-00713884 , version 1 (03-07-2012)

Identifiers

Cite

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, 2012, 717, pp.129-150. ⟨10.1016/j.physletb.2012.09.028⟩. ⟨in2p3-00713884⟩
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