Next-to-leading order QCD corrections to the direct top quark production via model-independent FCNC couplings at hadron colliders

Journal Article · Sat Oct 01 04:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.074018· OSTI ID:20713643

Jianjun, Liu; Chongsheng, Li; Lilin, Yang; Ligang, Jin ^[1]

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1. Department of Physics, Peking University, Beijing 100871 (China)

We calculated the next-to-leading order (NLO) QCD corrections to the cross sections for direct top quark productions induced by model-independent flavor-changing neutral current couplings at hadron colliders. The NLO results increase the experimental sensitivity to the anomalous couplings. Our results show that the NLO QCD corrections enhance the leading order (LO) total cross sections at the Tevatron Run 2 about 60% for both {kappa}{sub tc}{sup g} and {kappa}{sub tu}{sup g} couplings, and enhance the LO total cross sections at the LHC about 40% for {kappa}{sub tc}{sup g} couplings and 50% for {kappa}{sub tu}{sup g} couplings, respectively. Moreover, the NLO QCD corrections vastly reduce the dependence of the total cross sections on the renormalization or factorization scale, which leads to increased confidence in predictions based on these results.

• OSTI ID: 20713643
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CERN LHC
CORRECTIONS
COUPLING
FACTORIZATION
FERMILAB TEVATRON
FLAVOR MODEL
HADRONS
NEUTRAL CURRENTS
QUANTUM CHROMODYNAMICS
RENORMALIZATION
SENSITIVITY
T QUARKS