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Title: Next-to-leading order QCD corrections to the top quark decay via the flavor-changing neutral-current operators with mixing effects

Abstract

Detailed calculations of the complete O({alpha}{sub s}) corrections to the top-quark decay widths {Gamma}(t{yields}q+V) with V=g, {gamma}, Z, and q=u, c are presented. Besides describing in detail the calculations in our previous work [Phys. Rev. Lett. 102, 072001 (2009)], we also include the mixing effects of the flavor-changing neutral-current operators for t{yields}q+{gamma} and t{yields}q+Z, which were not considered previously. We show that the mixing effects can either be large or small depending on the values of various anomalous couplings and thereby increase or decrease the branching ratios for t{yields}q+{gamma} and t{yields}q+Z.

Authors:
; ;  [1];  [1];  [2];  [3]
  1. Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)
  2. Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, 48824-1116 (United States)
  3. Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan (China)
Publication Date:
OSTI Identifier:
21421346
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 82; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.82.073005; (c) 2010 American Institute of Physics; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANCHING RATIO; COMPUTERIZED SIMULATION; CORRECTIONS; COUPLING; FLAVOR MODEL; MIXING; NEUTRAL CURRENTS; PARTICLE DECAY; QUANTUM CHROMODYNAMICS; T QUARKS; ALGEBRAIC CURRENTS; COMPOSITE MODELS; CURRENTS; DECAY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; MATHEMATICAL MODELS; PARTICLE MODELS; POSTULATED PARTICLES; QUANTUM FIELD THEORY; QUARK MODEL; QUARKS; SIMULATION; TOP PARTICLES

Citation Formats

Jiajun, Zhang, Jun, Gao, Huaxing, Zhu, Chongsheng, Li, Center for High Energy Physics, Peking University, Beijing, 100871, Yuan, C -P, and Yuan, T -C. Next-to-leading order QCD corrections to the top quark decay via the flavor-changing neutral-current operators with mixing effects. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.82.073005.
Jiajun, Zhang, Jun, Gao, Huaxing, Zhu, Chongsheng, Li, Center for High Energy Physics, Peking University, Beijing, 100871, Yuan, C -P, & Yuan, T -C. Next-to-leading order QCD corrections to the top quark decay via the flavor-changing neutral-current operators with mixing effects. United States. https://doi.org/10.1103/PHYSREVD.82.073005
Jiajun, Zhang, Jun, Gao, Huaxing, Zhu, Chongsheng, Li, Center for High Energy Physics, Peking University, Beijing, 100871, Yuan, C -P, and Yuan, T -C. Fri . "Next-to-leading order QCD corrections to the top quark decay via the flavor-changing neutral-current operators with mixing effects". United States. https://doi.org/10.1103/PHYSREVD.82.073005.
@article{osti_21421346,
title = {Next-to-leading order QCD corrections to the top quark decay via the flavor-changing neutral-current operators with mixing effects},
author = {Jiajun, Zhang and Jun, Gao and Huaxing, Zhu and Chongsheng, Li and Center for High Energy Physics, Peking University, Beijing, 100871 and Yuan, C -P and Yuan, T -C},
abstractNote = {Detailed calculations of the complete O({alpha}{sub s}) corrections to the top-quark decay widths {Gamma}(t{yields}q+V) with V=g, {gamma}, Z, and q=u, c are presented. Besides describing in detail the calculations in our previous work [Phys. Rev. Lett. 102, 072001 (2009)], we also include the mixing effects of the flavor-changing neutral-current operators for t{yields}q+{gamma} and t{yields}q+Z, which were not considered previously. We show that the mixing effects can either be large or small depending on the values of various anomalous couplings and thereby increase or decrease the branching ratios for t{yields}q+{gamma} and t{yields}q+Z.},
doi = {10.1103/PHYSREVD.82.073005},
url = {https://www.osti.gov/biblio/21421346}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 82,
place = {United States},
year = {2010},
month = {10}
}