Neutral top pion and the rare top decays t{yields}cl{sub i}l{sub j}

Journal Article · Wed Sep 01 04:00:00 EDT 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.054011· OSTI ID:20705133

Chongxing, Yue; Lei, Wang; Dongqi, Yu ^[1]

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1. Department of Physics, Liaoning Normal University, Dalian 116029 (China)

We study the rare top decays t{yields}cl{sub i}l{sub j} (l={tau} , {mu}, or e) in the framework of topcolor-assisted technicolor (TC2) models. We find that the neutral top pion {pi}{sub t}{sup 0} can produce significant contributions to these processes via the flavor changing couplings {pi}{sub t}{sup 0}tc and {pi}{sub t}{sup 0}l{sub i}l{sub j}. For the {pi}{sub t}{sup 0} mass m{sub {pi}{sub t}}=150 GeV and the parameter {epsilon}=0.08, the branching ratio Br(t{yields}c{tau}{tau}) can reach 7.1x10{sup -7}. Taking into account the constraints of the present experimental limit of the process {mu}{yields}e{gamma} on the free parameters of TC2 models, we find that the value of Br(t{yields}c{tau}{mu}){approx_equal}Br(t{yields}c{tau}e) is in the range of 1.8x10{sup -10}-1.7x10{sup -8}.

• OSTI ID: 20705133
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 70; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
C QUARKS
ELECTRONS
GEV RANGE
MUONS
PARTICLE DECAY
PARTICLE PRODUCTION
PIONS
REST MASS
T QUARKS