CP violation of the loop induced $H^\pm \to W^\pm Z$ decays in general two Higgs doublet model

TL;DR

This paper investigates how CP violation in a general two Higgs doublet model affects the loop-induced decays of charged Higgs bosons into W and Z bosons, highlighting potential observable differences sensitive to CP phases.

Contribution

It provides a detailed analysis of the CP violating effects on the $H^ o W Z$ decay vertices and demonstrates the sensitivity of decay asymmetries to CP phases in the model.

Findings

The decay rate difference between $H^+ o W^+ Z$ and $H^- o W^- Z$ is sensitive to CP violating phases.

Loop-induced vertices are significantly affected by CP violation in the model.

The study offers potential experimental signatures for CP violation in extended Higgs sectors.

Abstract

New sources of CP violation are necessary to solve the problem of the baryon asymmetry of the Universe. Extending Higgs sector is one way to introduce such new CP violating phases, and studying observables resulting from the CP violation is important to test the model in future experiments. In these proceedings, we discuss the loop induced $ H^\pm W^\mp Z$ vertices in the CP violating general two Higgs doublet model, summarizing our results. We evaluate impacts of the CP violation on the decays $H^\pm \to W^\pm Z$ through these vertices, and find that the difference between the decays $H^+ \to W^+ Z$ and $H^- \to W^- Z$ is sensitive to the CP violating phases in the model.