Measurement of the charge asymmetry in top-quark pair production in proton–proton collisions at √s = 7 TeV
Name
Chatrchyan-2012-Measurement of the c.pdf
Size
601.39 KB
Format
Adobe PDF
Checksum (MD5)
31982a7fb786e7655306d7fff5f417f5
Author(s)
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
Date Issued
February 2012
Journal
Physics Letters B
Publisher
Elsevier
Citation
Chatrchyan, S., V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Measurement of the Charge Asymmetry in Top-Quark Pair Production in Proton–proton Collisions at √s = 7 TeV.” Physics Letters B 709, no. 1–2 (March 2012): 28–49. © 2012 CERN
Version
Final published version
Abstract
The difference in angular distributions between top quarks and antiquarks, commonly referred to as the charge asymmetry, is measured in pp collisions at the LHC with the CMS experiment. The data sample corresponds to an integrated luminosity of 1.09 fb[superscript −1] at a centre-of-mass energy of 7 TeV. Top-quark pairs are selected in the final state with an electron or muon and four or more jets. At least one jet is identified as originating from b-quark hadronization. The charge asymmetry is measured in two variables, one based on the pseudorapidities (η) of the top quarks and the other on their rapidities (y). The results A[η over C] = −0.017 ± 0.032 (stat.)[+0.025 over −0.036] (syst.) and A[y over C] = −0.013 ± 0.028 (stat.)[+0.029 over −0.031] (syst.) are consistent within uncertainties with the standard-model predictions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.physletb.2012.01.078
