1307.4412 (Chee Sheng Fong et al.)

Quark masses, mixings and CP violation from spontaneous breaking of
flavour $SU(3)^{3}$    [PDF]

Chee Sheng Fong, Enrico Nardi

A ${\cal G}_{\cal F}=SU(3)_{Q}\times SU(3)_{u}\times SU(3)_{d}$ invariant scalar potential breaking spontaneously the quark flavour symmetry can explain the standard model flavor puzzle and automatically avoids the strong CP problem yielding, at the symmetry breaking minimum, $\theta_{QCD}=0$. The approximate alignment in flavour space of the vacuum expectation values of the up and down `Yukawa fields' is explained as a dynamical effect, and the observed quark mixing angles, the weak CP violating phase, and hierarchical quark masses can be reproduced without introducing hierarchical parameters.

View original: http://arxiv.org/abs/1307.4412