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

Abstract

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.

Authors:

Chatrchyan, Serguei ^[1]

et al.

Publication Date:: Wed Apr 30 00:00:00 EDT 2014

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

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

Contributing Org.:: CMS Collaboration

OSTI Identifier:: 1151726

Report Number(s):: FERMILAB-PUB-14-077-CMS; CERN-PH-EP-2014-010; CMS-TOP-12-010
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1402.3803

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: Journal of High Energy Physics (Online)

Additional Journal Information:: Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2014; Journal Issue: 4; Journal ID: ISSN 1029-8479

Publisher:: Springer Berlin

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Chatrchyan, Serguei. Measurements of the $t\bar{t}$ charge asymmetry using the dilepton decay channel in pp collisions at $\sqrt{s} =$ 7 TeV.  United States: N. p., 2014. 
Web.  doi:10.1007/JHEP04(2014)191.

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                    Chatrchyan, Serguei. Measurements of the $t\bar{t}$ charge asymmetry using the dilepton decay channel in pp collisions at $\sqrt{s} =$ 7 TeV.  United States.  https://doi.org/10.1007/JHEP04(2014)191

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                    Chatrchyan, Serguei. Wed .  
"Measurements of the $t\bar{t}$ charge asymmetry using the dilepton decay channel in pp collisions at $\sqrt{s} =$ 7 TeV".  United States.  https://doi.org/10.1007/JHEP04(2014)191.  https://www.osti.gov/servlets/purl/1151726.

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@article{osti_1151726,

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

  author       = {Chatrchyan, Serguei},

  abstractNote = {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 Aclep = 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.},

  doi          = {10.1007/JHEP04(2014)191},

  journal      = {Journal of High Energy Physics (Online)},

  number       = 4,

  volume       = 2014,

  place        = {United States},

  year         = {Wed Apr 30 00:00:00 EDT 2014},

  month        = {Wed Apr 30 00:00:00 EDT 2014}

}

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