Precision calculations in the MSSM Higgs-boson sector with FeynHiggs 2.14

Preprint number: CP3-Origins-2018-35 DNRF90
Authors: Henning Bahl (Max-Planck-Institut fuer Physik, Munich), Thomas Hahn (Max-Planck-Institut fuer Physik, Munich), Sven Heinemeyer (Instituto de Fisica Teorica, Universidad Autonoma de Madrid Cantoblanco, Madrid), Wolfgang Hollik (Max-Planck-Institut fuer Physik, Munich), Sebastian Passehr (Sorbonne Universite, CNRS, LPTHE, Paris), Heidi Rzehak (CP3-Origins, SDU, Odense), and Georg Weiglein (DESY, Hamburg)
We present an overview of the status and recent developments of FeynHiggs (current version: 2.14.3) since version 2.12.2. The main purpose of FeynHiggs is the calculation of the Higgs-boson masses and other physical observables in the MSSM. For a precise prediction of the Higgs-boson masses for low and high SUSY scales, state-of-the-art fixed-order and effective-field-theory calculations are combined. We first discuss improvements of the fixed-order calculation, namely an optional $\overline{\text{DR}}$ renormalization of the stop sector and a renormalization of the Higgs sector ensuring the chosen input mass to be equivalent with the corresponding physical mass. Second, we describe improvements of the EFT calculation, i.e. an implementation of non-degenerate threshold corrections as well as an interpolation for complex parameters. Lastly, we highlight some improvements of the code structure easing future extensions of FeynHiggs to models beyond the MSSM.