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

Journal Article · Fri Oct 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.073005· OSTI ID:21421346

Jiajun, Zhang; Jun, Gao; Huaxing, Zhu ^[1]; Chongsheng, Li ^[1]; Yuan, C -P ^[2]; Yuan, T -C ^[3]

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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)

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.

• OSTI ID: 21421346
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 7; Other Information: DOI: 10.1103/PhysRevD.82.073005; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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