Grand Unified Flavour Physics

Abstract

We probe the unification of down quarks and leptons in a supersymmetric SO(10) GUT. The large atmospheric neutrino mixing angle induces bR-sR transitions, which can account for the sizeable CP phase measured in Bs-Bsbar mixing. Corrections to down-quark-lepton unification from higher-dimensional Yukawa terms translate neutrino mixing also into sR-dR and bR-dR currents. We find the flavour structure of Yukawa corrections to be strongly constrained by epsilonK.

Comments: proceedings of SUSY'09, june 5-10, Northeastern University, Boston MA; 4 pages, 2 figures