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

TL;DR

This paper details the implementation of two-loop Higgs-mass corrections of order alpha_t^2 in the complex MSSM within the FeynHiggs software, enhancing its precision for Higgs mass calculations.

Contribution

The paper introduces a new implementation of two-loop Higgs-mass corrections in FeynHiggs, providing a reusable template for similar calculations in supersymmetric models.

Findings

Implementation of O(alpha_t^2) corrections in FeynHiggs

Enhanced accuracy in Higgs mass predictions

Detailed documentation for reproducibility

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.