Precision calculations in BSM theories — Higgs mass and Muon $g − 2$

Two recent results in the field of BSM precision calculations are reviewed: (1) For 3-loop calculations of the MSSM Higgs mass, the problem of regularization is considered. It is proven that regularization by dimensional reduction is consistent with supersymmetry for such calculations in the gaugeless limit. (2) The general 2-Higgs doublet model and the muon (g-2) is considered. Constraints on the possible values of Yukawa couplings derived. It is then shown that the current deviation in the muon (g-2) can be explained in a small but interesting part of the 2-Higgs doublet model parameter space.