Consistent Treatment of Imaginary Contributions to Higgs-Boson Masses in the MSSM

TL;DR

This paper presents a method to consistently incorporate imaginary parts of Higgs-Boson self-energies in the MSSM, significantly affecting mass predictions and implemented in the FeynHiggs code.

Contribution

It introduces a consistent approach to include imaginary self-energy contributions in Higgs mass calculations within the MSSM.

Findings

Imaginary parts can cause up to 5 GeV shifts in Higgs mass differences.

The method is implemented in the FeynHiggs code.

Including imaginary parts improves the accuracy of Higgs mass predictions.

Abstract

We show how the imaginary parts of the Higgs-Boson self-energies in the MSSM are consistenly taken into account in the Higgs-Boson mass determination. In a numerical example we find effects of 5 GeV in the mass difference of the two heavy neutral Higgs bosons. The imaginary contributions have been included into the code FeynHiggs.