Measurements of the tt¯ charge asymmetry using the dilepton decay channel in pp collisions at s√ = 7 TeV

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Issue Date
2014-04Author
CMS Collaboration
Sanders, Stephen J.
Publisher
Springer Verlag
Type
Article
Article Version
Scholarly/refereed, publisher version
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Show full item recordAbstract
The tt¯ 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−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 C = −0.010 ± 0.017 (stat.) ± 0.008 (syst.) and AlepC = 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 tt¯ system. All measurements are consistent with the expectations of the standard model.
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This is the published version.
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Citation
The CMS collaboration. "Measurements of the tt¯ charge asymmetry using the dilepton decay channel in pp collisions at s√ = 7 TeV." Journal of High Energy Physics. April, 2014: v5n4. http://dx.doi.org/10.1007/JHEP04(2014)191
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