CP violation and CKM predictions from discrete torsion

Abstract We present a supersymmetric D-brane model that has CP spontaneously broken by discrete torsion. The low energy physics is largely independent of the compactification scheme and the Kahler metric has ‘texture zeros’ dictated by the choice of discrete torsion. This motivates a simple ansatz for the Kahler metric which results in a CKM matrix given in terms of two free parameters, hence we predict a single mixing angle and the CKM phase. The CKM phase is predicted to be close to π /3.