Measurements of the t[bar over t] charge asymmetry using the dilepton decay channel in pp collisions at √s = 7 TeV
Name
Chatrchyan-2014-Measurements of the.pdf
Size
570.68 KB
Format
Adobe PDF
Checksum (MD5)
22549c8dcb784058c5141f2f2cdbb5fd
Author(s)
Apyan, Aram
Busza, Wit
Cali, Ivan Amos
Chan, M.
Di Matteo, Leonardo
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Gulhan, Doga Can
Klute, Markus
Lai, Yue Shi
Date Issued
April 2014
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Chatrchyan, S., V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Measurements of the t[bar over t] charge asymmetry using the dilepton decay channel in pp collisions at √s = 7 TeV.” J. High Energ. Phys. 2014, no. 4 (April 2014). doi:10.1007/jhep04(2014)191.
Version
Final published version
Abstract
The t[bar over t] charge asymmetry in proton-proton collisions at √s = 7 TeV is measured using the dilepton decay channel (ee, eμ, or μμ). The data correspond to a total integrated luminosity of 5.0 fb[superscript −1], collected by the CMS experiment at the LHC. The tt and lepton charge asymmetries, defined as the differences in absolute values of the rapidities between the reconstructed top quarks and antiquarks and of the pseudorapidities between the positive and negative leptons, respectively, are measured to be A [subscript C] = −0.010 ± 0.017 (stat.) ± 0.008 (syst.) and A[lep over C] = 0.009 ± 0.010 (stat.) ± 0.006 (syst.). The lepton charge asymmetry is also measured as a function of the invariant mass, rapidity, and transverse momentum of the t[bar over t] system. All measurements are consistent with the expectations of the standard model.
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/10.1007/jhep04(2014)191
