Home > Research > Publications & Outputs > Measurement of Top Quark Polarization in Top-An...

Associated organisational unit

Electronic data

  • PhysRevLett.111.232002

    Rights statement: Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2013 CERN, for the ATLAS Collaboration

    Final published version, 529 KB, PDF document

    Available under license: CC BY

Links

Text available via DOI:

View graph of relations

Measurement of Top Quark Polarization in Top-Antitop Events from Proton-Proton Collisions at s√=7  TeV Using the ATLAS Detector

Research output: Contribution to journalJournal articlepeer-review

Published
  • The ATLAS collaboration
Close
Article number232002
<mark>Journal publication date</mark>4/12/2013
<mark>Journal</mark>Physical review letters
Issue number23
Volume111
Number of pages19
Publication StatusPublished
<mark>Original language</mark>English

Abstract

This Letter presents measurements of the polarization of the top quark in top-antitop quark pair events, using 4.7  fb−1 of proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at s√=7  TeV. Final states containing one or two isolated leptons (electrons or muons) and jets are considered. Two measurements of αℓP, the product of the leptonic spin-analyzing power and the top quark polarization, are performed assuming that the polarization is introduced by either a CP conserving or a maximally CP violating production process. The measurements obtained, αℓPCPC=−0.035±0.014(stat)±0.037(syst) and αℓPCPV=0.020±0.016(stat)+0.013−0.017(syst), are in good agreement with the standard model prediction of negligible top quark polarization.

Bibliographic note

Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2013 CERN, for the ATLAS Collaboration