Flavor-changing top quark rare decays in the littlest Higgs model with T parity

Journal Article · Tue May 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.094010· OSTI ID:21020482

Hou, Hongsheng ^[1]

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1. Ottawa-Carleton Institute for Physics, Department of Physics, Carleton University, Ottawa, K1S 5B6 (Canada)

We analyze the rare and flavor-changing decay of the top quark into a charm quark and a gauge boson in the littlest Higgs model with T parity (LHT). We calculate the one-loop level contributions from the T parity odd mirror quarks and gauge bosons. We find that the decay t{yields}cV, (V=g,{gamma},Z) in the LHT model can be significantly enhanced relative to those in the standard model. Our numerical results show that the top quark flavor-changing neutral current decay can be as large as Br(t{yields}cg){approx}10{sup -2}, Br(t{yields}cZ){approx}10{sup -5}, and Br(t{yields}c{gamma}){approx}10{sup -7} in the favorite parameter space in the LHT model.

• OSTI ID: 21020482
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BRANCHING RATIO
C QUARKS
FEYNMAN DIAGRAM
FLAVOR MODEL
GLUONS
HIGGS MODEL
NEUTRAL CURRENTS
PARITY
REST MASS
STANDARD MODEL
T QUARKS