Universality of strength for Yukawa couplings with extra down-type quark singlets
Higuchi, Katsuichi · Senami, Masato · Yamamoto, Katsuji
Original · EN
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 mₜ ≫ mb also appears naturally in the USY scheme with the down-type quark singlets.
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