Inclusive and differential measurements of the t t-bar charge asymmetry in proton-proton collisions at 7 TeV
(2012) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 717, n° 1-3, p. 129-150 (2012)
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- 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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CMS Collaboration, Quertenmont, L., Chatrchyan, S., Basegmez, S., Bruno, G., Castello, R., Ceard, L., Delaere, C., Du Pree, T., Favart, D., Forthomme, L., Giammanco, A., Hollar, J., Lemaitre, V., Liao, J., Militaru, O., Nuttens, C., Pagano, D., Pin, A., et al. (2012). Inclusive and differential measurements of the t t-bar charge asymmetry in proton-proton collisions at 7 TeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 717(1-3), 129-150. https://doi.org/10.1016/j.physletb.2012.09.028 (Original work published 2012)