Charged Scalar Particles and $τ$ Leptonic Decay

Details Charged Scalar Particles and $τ$ Leptonic Decay Charged Scalar Particles and $τ$ Leptonic Decay

1993-02-18

arxiv.org/abs/hep-ph/9302276v1

Phys.Rev. D48 (1993) 3221-3224

Physics

High Energy Physics

High Energy Physics - Phenomenology

ICTP Report No. IC/93/31, 12 pages, Latex, one figure is not included, it is available upon demand

Scientific paper

10.1103/PhysRevD.48.3221

Charged scalar particles introduced in some extensions of the standard model can induce $\tau$ leptonic decay at tree level. We find that with some charged SU(2)-singlet scalar particles, like ones introduced in Zee-type models, $\tau$ leptonic decay width is always smaller than what is predicted by the standard model, therefore they may offer a natural solution to $\tau$ decay puzzle. To be more specific, we examine some Zee-type models in detail to see if at the same time they are acceptable in particle physics, cosmology and astrophysics. It is shown that $\tau$ decay data do put some constrains on these models.

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