Finding neutral Higgs bosons in a two-Higgs-doublet model with spontaneous CP violation

TL;DR

This paper explores a two-Higgs-doublet model with spontaneous CP violation, analyzing how the Higgs boson masses and detection prospects at colliders are affected by the CP violation parameter.

Contribution

It introduces a specific two-Higgs-doublet model with spontaneous CP violation and studies its implications for Higgs boson masses and collider detection prospects.

Findings

Higgs boson masses tend to converge towards the lightest Higgs mass as CP violation increases.

Detection chances at colliders improve with higher CP violation parameter.

The model predicts enhanced signals in Z+Higgs, bar{b}+Higgs, and tar{t}+Higgs production channels.

Abstract

We consider a particular two-Higgs-doublet model with spontaneous CP violation, where two neutral Higgses have no definite CP properties and the third one is CP-even. In this model, as the parameter $\theta$ of CP violation increases, the masses of the neutral Higgs bosons are drawn towards the mass of the lightest one and the chance of detection of neutral Higgses at an $e^+e^-$ collider in Z+Higgs, $b\bar{b}$+Higgs and $t\bar{t}$+Higgs production increases with respect to the CP conserving case.