Precision Higgs Masses with FeynHiggs 2.2

TL;DR

This paper presents FeynHiggs 2.2, a comprehensive tool for precise MSSM Higgs phenomenology, including masses $M_h$, mixing angles, and decay properties with state-of-the-art radiative corrections. The core is a static Fortran library, accessible from Fortran, C/C++, and via multiple frontends (command-line, WWW, Mathematica) and supports real, complex, and non-minimal flavour-violating MSSM. It delivers up-to-date two-loop corrections of order $ ext{O}(\alpha_s\alpha_t,\alpha_t^2)$, full one-loop results with all phases, $q^2$-dependent propagators, $\\Delta m_b$ effects, and non-minimal flavour violation, along with SLHA compatibility and uncertainty estimates. The suite enables precise, flexible Higgs phenomenology and can be integrated into broader theoretical and experimental workflows.

Abstract

FeynHiggs is a program for computing MSSM Higgs-boson masses and related observables, such as mixing angles, branching ratios, and couplings, including state-of-the-art higher-order contributions. The centerpiece is a Fortran library for use with Fortran and C/C++. Alternatively, FeynHiggs has a command-line, Mathematica, and Web interface. The command-line interface can process, besides its native format, files in SUSY Les Houches Accord format. FeynHiggs is an open-source program and easy to install.

Figures (1)

• Figure 1: The FeynHiggs User Control Center.