Measurements of the $t\bar{t}$ charge asymmetry using the dilepton decay channel in pp collisions at $\sqrt{s} =$ 7 TeV

Chatrchyan, Serguei

doi:10.1007/JHEP04(2014)191

Title: Measurements of the $$t\bar{t}$$ charge asymmetry using the dilepton decay channel in pp collisions at $$\sqrt{s} =$$ 7 TeV

Journal Article · Wed Apr 30 00:00:00 EDT 2014 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP04(2014)191· OSTI ID:1151726

Chatrchyan, Serguei ^[1]

et al.

The t t-bar charge asymmetry in proton-proton collisions at $$\sqrt{s} =$$ 7 TeV is measured using the dilepton decay channel (ee, e mu, or mu mu). The data correspond to a total integrated luminosity of 5.0 inverse femtobarns, collected by the CMS experiment at the LHC. The t t-bar 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 Ac = -0.010 +/- 0.017 (stat.) +/- 0.008 (syst.) and A_c^lep = 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 t-bar system. All measurements are consistent with the expectations of the standard model.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: CMS Collaboration

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1151726

Report Number(s):: FERMILAB-PUB-14-077-CMS; CERN-PH-EP-2014-010; CMS-TOP-12-010; arXiv eprint number arXiv:1402.3803

Journal Information:: Journal of High Energy Physics (Online), Vol. 2014, Issue 4; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 40 works

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