MSSM Higgs Bosons from Stop and Chargino Decays

TL;DR

This paper reviews the decay modes of MSSM Higgs bosons originating from stop and chargino decays, emphasizing the importance of one-loop corrections for accurate predictions at future colliders.

Contribution

It provides a comprehensive one-loop calculation of specific MSSM decay modes involving Higgs bosons, highlighting significant radiative corrections.

Findings

Sizable one-loop contributions to decay widths and branching ratios.

Corrections can reach 30% or higher of tree-level results.

Implications for interpreting scalar top quark decays at future colliders.

Abstract

The Higgs bosons of the MSSM can be produced from the decay of SUSY particles. We review the evalulation of two decay modes in the MSSM with complex parameters (cMSSM). The first type is the decay of the heavy scalar top quark to a lighter scalar quark and a Higgs boson. The second type is the decay of the heavy chargino to a lighter chargino/neutralino and a Higgs boson. The evaluation is based on a full one-loop calculation including hard QED and QCD radiation. We find sizable contributions to many partial decay widths and branching ratios. They are roughly of O(10%) of the tree-level results, but can go up to 30% or higher. These contributions are important for the correct interpretation of scalar top quark decays at a future linear e+e- collider.