Approaching Minimal Flavour Violation from an SU(5) × S 4 × U(1) SUSY GUT

We show how approximate minimal flavour violation (mfv) can emerge from an su(5) supersymmetric grand unified theory (susy gut) supplemented by an s 4 × u(1) family symmetry, which provides a good description of all quark and lepton (including neutrino) masses, mixings and cp violation. assuming a susy breaking mechanism which respects the family symmetry, we calculate in full explicit detail the low energy mass insertion parameters in the super-ckm basis, including the effects of canonical normalisation and renormalisation group running. we find that the very simple family symmetry s 4 ×u(1) is sufficient to approximately reproduce the effects of low energy mfv.