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

CMS Collaboration; Canelli, M F; Chiochia, V; Kilminster, B; Robmann, P; et al (2014). Measurements of the $\mathrm{t}\overline{\mathrm{t}}$ charge asymmetry using the dilepton decay channel in pp collisions at $\sqrt{s}$ = 7 TeV. Journal of High Energy Physics, 2014(191):online.

## Abstract

The $\mathrm{t}\overline{\mathrm{t}}$ 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 /pm 0.017 (stat.) /pm 0.008 (syst.) and $A_{\mathrm{C}}^{\mathrm{lep}}$ = 0.009 /pm 0.010 (stat.) /pm- 0.006 (syst). The lepton charge asymmetry is also measured as a function of the invariant mass, rapidity, and transverse momentum of the $\mathrm{t}\overline{\mathrm{t}}$ system. All measurements are consistent with the expectations of the standard model.

## Abstract

The $\mathrm{t}\overline{\mathrm{t}}$ 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 /pm 0.017 (stat.) /pm 0.008 (syst.) and $A_{\mathrm{C}}^{\mathrm{lep}}$ = 0.009 /pm 0.010 (stat.) /pm- 0.006 (syst). The lepton charge asymmetry is also measured as a function of the invariant mass, rapidity, and transverse momentum of the $\mathrm{t}\overline{\mathrm{t}}$ system. All measurements are consistent with the expectations of the standard model.

## Statistics

### Citations

7 citations in Web of Science®
18 citations in Scopus®

### Altmetrics

Detailed statistics

Item Type: Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics English 2014 24 Feb 2015 14:03 05 Apr 2016 19:03 Springer 1029-8479 https://doi.org/10.1007/JHEP04(2014)191

Preview
Content: Accepted Version
Filetype: PDF
Size: 560kB
View at publisher
Preview
Content: Published Version
Filetype: PDF
Size: 584kB

## TrendTerms

TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents.
You can navigate and zoom the map. Mouse-hovering a term displays its timeline, clicking it yields the associated documents.