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Title: Forward-backward asymmetry in top quark-antiquark production

Journal Article · · Physical Review. D, Particles, Fields, Gravitation and Cosmology

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 dataset corresponding to an integrated luminosity of 5.4 fb-1, collected by the D0 experiment at the Fermilab Tevatron Collider, we measure the t{bar t} 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.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Contributing Organization:
D0 Collaboration
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1021499
Alternate ID(s):
OSTI ID: 1098388
Report Number(s):
FERMILAB-PUB-11-347-E; arXiv eprint number arXiv:1107.4995; TRN: US1104010
Journal Information:
Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 84, Issue 11; ISSN 1550-7998
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 197 works
Citation information provided by
Web of Science

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Cited By (22)

Review of recent measurements in the top quark sector at the Tevatron journal June 2014
Measurement of the forward–backward asymmetry of top-quark and antiquark pairs using the full CDF Run II data set journal June 2016
Top forward-backward asymmetry and the CDF W j j excess in leptophobic U ( 1 ) flavor models journal June 2012
Top-quark charge asymmetry with a jet handle journal November 2012
Top quark physics at the Tevatron using t t ¯ events journal March 2012
Review of Tevatron results: Top quark physics journal February 2015
Combined Forward-Backward Asymmetry Measurements in Top-Antitop Quark Production at the Tevatron journal January 2018
Constraints on four-fermion interactions from the $$t\bar{t}$$ t t ¯ charge asymmetry at hadron colliders journal April 2016
Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties text January 2013
Top Quark Physics at the lhc: a Review of the First two Years journal June 2012
Top-quark processes at NLO in production and decay journal December 2014
Measurement of the forward–backward asymmetry of top-quark and antiquark pairs using the full CDF Run II data set text January 2016
Combined Forward-Backward Asymmetry Measurements in Top-Antitop Quark Production at the Tevatron text January 2018
Combined Forward-Backward Asymmetry Measurements in Top-Antitop Quark Production at the Tevatron text January 2018
Setting the Renormalization Scale in QCD: The Principle of Maximum Conformality text January 2011
Eliminating the Renormalization Scale Ambiguity for Top-Pair Production Using the Principle of Maximum Conformality text January 2012
Top quark and leptonic charge asymmetries for the Tevatron and LHC text January 2012
Top Quark Physics at the LHC: A Review of the First Two Years text January 2012
Transverse-momentum resummation for top-quark pairs at hadron colliders text January 2012
Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties text January 2012
Review of recent measurements in the top quark sector at the Tevatron text January 2014
Anticipating Non-Resonant New Physics in Dilepton Angular Spectra at the LHC text January 2016