Universality of Strength of Yukawa Couplings, Quark Singlets and Strength of CP Violation

G. C. Branco, H. R. Colaço Ferreira, A. G. Hessler +1

We analyse the strength of CP violation in an extension of the standard model with an extra $Q=-1/3$ vector-like singlet quark, in the framework of the hypothesis of universality o…