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Title: Next-to-leading order QCD corrections to the single top quark production via model-independent tqg flavor-changing neutral-current couplings at hadron colliders

Abstract

We present the calculations of the complete next-to-leading order (NLO) QCD effects on the single top productions induced by model-independent tqg flavor-changing neutral-current couplings at hadron colliders. Our results show that, for the tcg coupling, the NLO QCD corrections can enhance the total cross sections by about 60% and 30%, and for the tug coupling by about 50% and 20% at the Tevatron and LHC, respectively, which means that the NLO corrections can increase the experimental sensitivity to the flavor-changing neutral-current couplings by about 10%-30%. Moreover, the NLO corrections reduce the dependence of the total cross sections on the renormalization or factorization scale significantly, which lead to increased confidence on the theoretical predictions. Besides, we also evaluate the NLO corrections to several important kinematic distributions, and find that for most of them the NLO corrections are almost the same and do not change the shape of the distributions.

Authors:
; ; ;  [1]
  1. Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)
Publication Date:
OSTI Identifier:
21313472
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 80; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.80.114017; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERN LHC; COMPUTERIZED SIMULATION; CORRECTIONS; COUPLING; DISTRIBUTION; FACTORIZATION; FERMILAB TEVATRON; FLAVOR MODEL; FORECASTING; HADRONS; NEUTRAL CURRENTS; PARTICLE PRODUCTION; QUANTUM CHROMODYNAMICS; RENORMALIZATION; SENSITIVITY; T QUARKS; TOTAL CROSS SECTIONS

Citation Formats

Jun, Gao, Chongsheng, Li, Jiajun, Zhang, and Huaxing, Zhu. Next-to-leading order QCD corrections to the single top quark production via model-independent tqg flavor-changing neutral-current couplings at hadron colliders. United States: N. p., 2009. Web. doi:10.1103/PHYSREVD.80.114017.
Jun, Gao, Chongsheng, Li, Jiajun, Zhang, & Huaxing, Zhu. Next-to-leading order QCD corrections to the single top quark production via model-independent tqg flavor-changing neutral-current couplings at hadron colliders. United States. https://doi.org/10.1103/PHYSREVD.80.114017
Jun, Gao, Chongsheng, Li, Jiajun, Zhang, and Huaxing, Zhu. Tue . "Next-to-leading order QCD corrections to the single top quark production via model-independent tqg flavor-changing neutral-current couplings at hadron colliders". United States. https://doi.org/10.1103/PHYSREVD.80.114017.
@article{osti_21313472,
title = {Next-to-leading order QCD corrections to the single top quark production via model-independent tqg flavor-changing neutral-current couplings at hadron colliders},
author = {Jun, Gao and Chongsheng, Li and Jiajun, Zhang and Huaxing, Zhu},
abstractNote = {We present the calculations of the complete next-to-leading order (NLO) QCD effects on the single top productions induced by model-independent tqg flavor-changing neutral-current couplings at hadron colliders. Our results show that, for the tcg coupling, the NLO QCD corrections can enhance the total cross sections by about 60% and 30%, and for the tug coupling by about 50% and 20% at the Tevatron and LHC, respectively, which means that the NLO corrections can increase the experimental sensitivity to the flavor-changing neutral-current couplings by about 10%-30%. Moreover, the NLO corrections reduce the dependence of the total cross sections on the renormalization or factorization scale significantly, which lead to increased confidence on the theoretical predictions. Besides, we also evaluate the NLO corrections to several important kinematic distributions, and find that for most of them the NLO corrections are almost the same and do not change the shape of the distributions.},
doi = {10.1103/PHYSREVD.80.114017},
url = {https://www.osti.gov/biblio/21313472}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 11,
volume = 80,
place = {United States},
year = {2009},
month = {12}
}