QCD corrections to associated production of tt{gamma} at hadron colliders

Journal Article · Wed Jul 01 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.014022· OSTI ID:21308528

Pengfei, Duan; Wengan, Ma; Renyou, Zhang; Liang, Han; Lei, Guo; Shaoming, Wang ^[1]

---

1. Department of Modern Physics, University of Science and Technology of China (USTC), Hefei, Anhui 230026 (China)

We report on the next-to-leading order (NLO) QCD computation of top-quark pair production in association with a photon at the Fermilab Tevatron RUN II and CERN Large Hadron Collider. We describe the impact of the complete NLO QCD radiative corrections to this process, and provide the predictions of the leading order (LO) and NLO integrated cross sections, distributions of the transverse momenta of the top quark and photon for the LHC and Tevatron, and the LO and NLO forward-backward top-quark charge asymmetries for the Tevatron. We investigate the dependence of the LO and NLO cross sections on the renormalization/factorization scale, and find the scale dependence of the LO cross section is obviously improved by the NLO QCD corrections. The K-factor of the NLO QCD correction is 0.977(1.524) for the Tevatron (LHC)

• OSTI ID: 21308528
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
CERN LHC
COMPUTERIZED SIMULATION
CROSS SECTIONS
DISTRIBUTION
FACTORIZATION
FERMILAB TEVATRON
FORECASTING
HADRONS
PAIR PRODUCTION
PHOTONS
QUANTUM CHROMODYNAMICS
RADIATIVE CORRECTIONS
RENORMALIZATION
T QUARKS
TRANSVERSE MOMENTUM