Next-to-leading order QCD predictions for t{gamma} associated production via model-independent flavor-changing neutral-current couplings at hadron colliders

Journal Article · Sun May 01 04:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.094003· OSTI ID:21541590

Yue, Zhang; Bohua, Li; Chongsheng, Li; Jun, Gao; Huaxing, Zhu ^[1]

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1. Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)

We present the complete next-to-leading order (NLO) QCD predictions for the t{gamma} associated production induced by model-independent tq{gamma} and tqg flavor-changing neutral-current (FCNC) couplings at hadron colliders, respectively. We also consider the mixing effects between the tq{gamma} and tqg FCNC couplings for this process. Our results show that, for the tq{gamma} couplings, the NLO QCD corrections can enhance the total cross sections by about 50% and 40% at the Tevatron and LHC, respectively. Including the contributions from the tq{gamma}, tqg FCNC couplings and their mixing effects, the NLO QCD corrections can enhance the total cross sections by about 50% for the tu{gamma} and tug FCNC couplings, and by about 80% for the tc{gamma} and tcg FCNC couplings at the LHC, respectively. Moreover, the NLO corrections reduce the dependence of the total cross section on the renormalization and factorization scale significantly. We also evaluate the NLO corrections for several important kinematic distributions.

• OSTI ID: 21541590
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ALGEBRAIC CURRENTS
CERN LHC
COMPOSITE MODELS
CORRECTIONS
COUPLING
CROSS SECTIONS
CURRENTS
CYCLIC ACCELERATORS
DISTRIBUTION
ELEMENTARY PARTICLES
FACTORIZATION
FERMILAB TEVATRON
FIELD THEORIES
FLAVOR MODEL
HADRONS
MATHEMATICAL MODELS
NEUTRAL CURRENTS
PARTICLE MODELS
PARTICLE PRODUCTION
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
RENORMALIZATION
STORAGE RINGS
SYNCHROTRONS
TOTAL CROSS SECTIONS