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

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.

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

References in corpus (8)

• Quark Singlets: Implications and Constraints
• Predicting Vckm with Universal Strength of Yukawa Couplings
• CP violation from new quarks in the chiral limit
• Almost Pure Phase Mass Matrices from Six Dimensions
• A New Approach to the Yukawa Puzzle
• Fermion Masses and Mixing in Intersecting Branes Scenarios
• Quark mixings and flavor changing interactions with singlet quarks
• Supersymmetry and a rationale for small CP violating phases

Cited by in corpus (4)

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