Top Decay in Topcolor-Assisted Technicolor

Details Top Decay in Topcolor-Assisted Technicolor Top Decay in Topcolor-Assisted Technicolor

1996-10-22

arxiv.org/abs/hep-ph/9610446v1

Phys.Lett. B393 (1997) 89-93

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 figure, TeX, harvmac.tex

Scientific paper

10.1016/S0370-2693(96)01606-1

Conventional technicolor models with light charged technipions ($\pi ^{\pm} _T$) lead to an unacceptably large contribution to $t\ra {\pi ^+_T} b$ decay rate. Topcolor-assisted technicolor models also have additional PGBs called top-pions ($\pi ^{\pm}_t$) which may contribute to this decay. We study the potentially dangerous mixing of charged top-pion and technipions in toy models of `natural' topcolor-assisted technicolor. We find that the $t\ra {\pi ^+_{t,T}} b$ decay rate in such models can be within experimental limits due to a combination of heavy top-pion and small $\pi _t - \pi_T$ mixing.

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