Implementation of the $\mathcal{O}{\left(\alpha_t^2\right)}$ MSSM Higgs-mass corrections in $\tt{FeynHiggs}$

Abstract

We describe the implementation of the two-loop Higgs-mass corrections of $\mathcal{O}{\left(\alpha_t^2\right)}$ in the complex MSSM in $\tt{FeynHiggs}$. The program for the calculation is included in $\tt{FeynHiggs}$ and documented here in some detail such that it can be re-used as a template for similar calculations.Comment: 12 pages, 1 figur