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Inclusive and differential measurements of the t[bar over t] charge asymmetry in proton-proton collisions at √s = 7 TeV

Author(s)
Apyan, Aram; Bendavid, Joshua L.; Busza, Wit; Butz, Erik M.; Cali, Ivan Amos; Chan, M.; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Kim, Y.; Klute, Markus; Krajczar, Krisztian F.; Li, W.; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Ralph, Duncan Kelley; Rudolph, Matthew Scott; Stephans, George S. F.; Sung, Kevin Kai Hong; Velicanu, Dragos Alexandru; Wenger, Edward Allen; Wyslouch, Boleslaw; Yilmaz, Yetkin; Yoon, A. S.; Zanetti, Marco; Luckey Jr, P David; Roland, Christof E; Roland, Gunther M; Stoeckli, Fabian; Sumorok, Konstanty C; Wolf, Roger; Xie, Si; Yang, Mingming; Bauer, Gerry P; Dutta, Valentina; ... Show more Show less
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Abstract
The t[bar over t] 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 fb[superscript −1] collected with the CMS detector at the LHC. An inclusive and three differential measurements of the t[bar over t] charge asymmetry as a function of rapidity, transverse momentum, and invariant mass of the t[bar over t] system are presented. The measured inclusive t[bar over t] charge asymmetry is A[subscript 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.
Date issued
2012-09
URI
http://hdl.handle.net/1721.1/91929
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. School of Science
Journal
Physics Letters B
Publisher
Elsevier
Citation
Chatrchyan, S., V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, E. Aguilo, T. Bergauer, et al. “Inclusive and Differential Measurements of the t[bar over t] Charge Asymmetry in Proton-Proton Collisions at √s = 7 TeV.” Physics Letters B 717, no. 1–3 (October 2012): 129–150. © 2012 CERN
Version: Final published version
ISSN
03702693

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