CP violating asymmetry in $H^\pm\to W^\pm h_1$ decays

TL;DR

This paper calculates the CP violating asymmetry in charged Higgs boson decays into a W boson and the lightest neutral Higgs within the complex MSSM, highlighting the impact of complex phases, especially from the top-squark trilinear coupling.

Contribution

It provides a detailed calculation of CP asymmetry in $H^\pm o W^\pm h_1$ decays considering all complex phases, emphasizing the significant role of the top-squark trilinear coupling.

Findings

Large CP asymmetry induced by top-squark phases

Comprehensive analysis of complex phase contributions

Potential implications for CP violation measurements

Abstract

The CP violating asymmetry from the decay rates $H^\pm\to W^\pm h_1$ of charged Higgs bosons into the lightest neutral Higgs boson and a $W^\pm$ boson is calculated and discussed in the complex MSSM. The contributions from all complex phases are considered, especially from the top-squark trilinear coupling, which induces a large contribution to the CP asymmetry.