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

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 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.

Authors:
 [1]
  1. et al.
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
D0 Collaboration
OSTI Identifier:
1021499
Alternate Identifier(s):
OSTI ID: 1098388
Report Number(s):
FERMILAB-PUB-11-347-E
Journal ID: ISSN 1550-7998; arXiv eprint number arXiv:1107.4995; TRN: US1104010
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 84; Journal Issue: 11; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; DECAY; FERMILAB TEVATRON; GLUONS; LEPTONS; LUMINOSITY; PRODUCTION; QUANTUM CHROMODYNAMICS; RADIATIONS; RESOLUTION; SENSITIVITY; SIMULATION; T QUARKS; Experiment-HEP

Citation Formats

Abazov, Victor Mukhamedovich. Forward-backward asymmetry in top quark-antiquark production. United States: N. p., 2011. Web. doi:10.1103/PhysRevD.84.112005.
Abazov, Victor Mukhamedovich. Forward-backward asymmetry in top quark-antiquark production. United States. doi:10.1103/PhysRevD.84.112005.
Abazov, Victor Mukhamedovich. Mon . "Forward-backward asymmetry in top quark-antiquark production". United States. doi:10.1103/PhysRevD.84.112005. https://www.osti.gov/servlets/purl/1021499.
@article{osti_1021499,
title = {Forward-backward asymmetry in top quark-antiquark production},
author = {Abazov, Victor Mukhamedovich},
abstractNote = {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.},
doi = {10.1103/PhysRevD.84.112005},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 11,
volume = 84,
place = {United States},
year = {2011},
month = {12}
}

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    Works referencing / citing this record:

    Review of recent measurements in the top quark sector at the Tevatron
    journal, June 2014


    Review of recent measurements in the top quark sector at the Tevatron
    journal, June 2014