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:
-
- et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (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. https://doi.org/10.1103/PhysRevD.84.112005
Abazov, Victor Mukhamedovich. Mon .
"Forward-backward asymmetry in top quark-antiquark production". United States. https://doi.org/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 = {Mon Dec 12 00:00:00 EST 2011},
month = {Mon Dec 12 00:00:00 EST 2011}
}
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