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Forward-backward asymmetry in top quark-antiquark production

Research output: Contribution to journalJournal article

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  • V. M. Abazov
  • B. Abbott
  • B. S. Acharya
  • M. Adams
  • T. Adams
  • G. D. Alexeev
  • G. Alkhazov
  • A. Alton
  • G. Alverson
  • G. A. Alves
  • M. Aoki
  • M. Arov
  • A. Askew
  • B. Asman
  • O. Atramentov
  • C. Avila
  • J. BackusMayes
  • F. Badaud
  • L. Bagby
  • B. Baldin
  • D. V. Bandurin
  • S. Banerjee
  • E. Barberis
  • P. Baringer
  • J. Barreto
  • J. F. Bartlett
  • U. Bassler
  • V. Bazterra
  • S. Beale
  • A. Bean
  • M. Begalli
  • M. Begel
  • C. Belanger-Champagne
  • L. Bellantoni
  • S. B. Beri
  • G. Bernardi
  • R. Bernhard
  • I. Bertram
  • M. Besancon
  • R. Beuselinck
  • V. A. Bezzubov
  • P. C. Bhat
  • V. Bhatnagar
  • G. Blazey
  • G. Borissov
  • H. Fox
  • D. Price
  • P. N. Ratoff
  • A. Ross
  • M. R. J. Williams
  • D0 Collaboration
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Article number112005
<mark>Journal publication date</mark>12/12/2011
<mark>Journal</mark>Physical Review D
Issue number11
Volume84
Number of pages13
Pages (from-to)-
Publication statusPublished
Original languageEnglish

Abstract

We present a measurement of forward-backward asymmetry in top quark-antiquark production in proton-antiproton collisions in the final state containing a lepton and at least four jets. Using a data set corresponding to an integrated luminosity of 5.4 fb(-1), collected by the D0 experiment at the Fermilab Tevatron Collider, we measure the t (t) over bar forward-backward asymmetry to be (9.2 +/- 3.7)% at the reconstruction level. When corrected for detector acceptance and resolution, the asymmetry is found to be (19.6 +/- 6.5)%. We also measure a corrected asymmetry based on the lepton from a top quark decay, found to be (15.2 +/- 4.0)%. The results are compared to predictions based on the next-to-leading-order QCD generator MC@NLO. The sensitivity of the measured and predicted asymmetries to the modeling of gluon radiation is discussed.

Bibliographic note

© 2011 American Physical Society