Yukawa enhanced electroweak corrections at high energy in the MSSM

Abstract

We consider the electroweak radiative corrections in the MSSM and study the purely Yukawa contributions ${\cal O}(\alpha^L y_t^{2p} y_b^{2q})$, $p+q=L$, where $y_{t,b}$ are the top and bottom quark Yukawa couplings. We show that these corrections can be computed in a gaugeless limit of the MSSM where they are under Renormalization Group control. As an application, we present explicit results for various ILC and LHC processes valid at all orders in the loop expansion and at leading order in the large logarithms that arise at high energy.