Effects of supersymmetric threshold corrections on the Yukawa matrix unification

Abstract

We present an updated analysis of the Yukawa matrix unification within the renormalizable R-parity-conserving Minimal Supersymmetric Standard Model. It is assumed that the soft terms are non-universal but flavour-diagonal in the super-CKM basis at the GUT scale. Trilinear Higgs–squark–squark (Formula present)-terms can generate large threshold corrections to the Yukawa matrix (Formula present) at the superpartner decoupling scale. In effect, the (Formula present) boundary condition (Formula present)Y(Formula present) at the GUT scale can be satisfied. However, such large trilinear terms make the usual Higgs vacuum metastable (though long-lived). We broaden previous studies by including results from the first LHC phase, notably the measurement of the Higgs particle mass, as well as a quantitative investigation of flavour observables.