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

Katsuichi Higuchi; Masato Senami; Katsuji Yamamoto

doi:10.1016/j.physletb.2006.06.002

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

High Energy Physics - Phenomenology 2009-11-11 v2

Authors: Katsuichi Higuchi , Masato Senami , Katsuji Yamamoto

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Abstract

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.

Keywords

Yukawa coupling quark CP violation CKM matrix down-type quark

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@article{arxiv.hep-ph/0603219,
  title  = {Universality of strength for Yukawa couplings with extra down-type quark singlets},
  author = {Katsuichi Higuchi and Masato Senami and Katsuji Yamamoto},
  journal= {arXiv preprint arXiv:hep-ph/0603219},
  year   = {2009}
}

Comments

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

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

Abstract

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