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

Journal Article · · Physical Review. D, Particles, Fields, Gravitation and Cosmology
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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{sup -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:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE SC OFFICE OF SCIENCE (SC)
DOE Contract Number:
DE-AC02-98CH10886
OSTI ID:
1038107
Report Number(s):
BNL-97117-2012-JA; PRVDAQ; KA1101021; TRN: US1201798
Journal Information:
Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 84, Issue 11; ISSN 1550-7998
Country of Publication:
United States
Language:
English

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Cited By (38)

NLO QCD predictions for off-shell t t ¯ $$ t\overline{t} $$ and t t ¯ H $$ t\overline{t}H $$ production and decay at a linear collider journal December 2016
Top-quark processes at NLO in production and decay journal December 2014
Top forward-backward asymmetry and the CDF W j j excess in leptophobic U ( 1 ) ′ flavor models journal June 2012
Top quark and leptonic charge asymmetries for the Tevatron and LHC journal August 2012
Setting the renormalization scale in QCD: The principle of maximum conformality journal October 2012
Top-quark charge asymmetry with a jet handle journal November 2012
Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties journal May 2013
Top quark pair production at small transverse momentum in hadronic collisions journal October 2013
Study of top quark production and decays involving a tau lepton at CDF and limits on a charged Higgs boson contribution journal May 2014
Measurement of the forward-backward asymmetry in the distribution of leptons in t t ¯ events in the lepton + jets channel journal October 2014
Measurement of the forward-backward asymmetry in top quark-antiquark production in p p ¯ collisions using the lepton + jets channel journal October 2014
Measurement of differential t t ¯ production cross sections in p p ¯ collisions journal November 2014
Top quark forward-backward asymmetry at approximate N LO 3 journal April 2015
Measurement of the charge asymmetry in top quark pair production in p p collisions at s = 8     TeV using a template method journal February 2016
Measurement of the forward–backward asymmetry of top-quark and antiquark pairs using the full CDF Run II data set journal June 2016
Anticipating nonresonant new physics in dilepton angular spectra at the LHC journal January 2017
Eliminating the Renormalization Scale Ambiguity for Top-Pair Production Using the Principle of Maximum Conformality journal July 2012
Transverse-Momentum Resummation for Top-Quark Pairs at Hadron Colliders journal February 2013
Resolving the Tevatron Top Quark Forward-Backward Asymmetry Puzzle: Fully Differential Next-to-Next-to-Leading-Order Calculation journal July 2015
Combined Forward-Backward Asymmetry Measurements in Top-Antitop Quark Production at the Tevatron journal January 2018
Top quark physics at the Tevatron using t t ¯ events journal March 2012
Asymmetries in top quark pair production at hadron colliders journal May 2015
Constraints on four-fermion interactions from the $$t\bar{t}$$ t t ¯ charge asymmetry at hadron colliders journal April 2016
Review of recent measurements in the top quark sector at the Tevatron journal June 2014
Top Quark Physics at the lhc: a Review of the First two Years journal June 2012
Review of Tevatron results: Top quark physics journal February 2015
Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties text January 2013
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

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Related Subjects

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