Universality of strength for Yukawa couplings with extra down-type quark singlets

Details Universality of strength for Yukawa couplings with extra down-type quark singlets Universality of strength for Yukawa couplings with extra down-type quark singlets

2006-03-27

arxiv.org/abs/hep-ph/0603219v2

Phys.Lett. B638 (2006) 492-496

Physics

High Energy Physics

High Energy Physics - Phenomenology

Only the title is shortened, accepted for Phys. Lett. B, 10 pages, 1. figure

Scientific paper

10.1016/j.physletb.2006.06.002

We investigate the quark masses and mixings by including vector-like down-type quark singlets in universality of strength for Yukawa couplings (USY). In contrast with the standard model with USY, the sufficient $ CP $ violation is obtained for the Cabibbo-Kobayashi-Maskawa matrix through the mixing between the ordinary quarks and quark singlets. The top-bottom mass hierarchy $ m_t \gg m_b $ also appears naturally in the USY scheme with the down-type quark singlets.

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