Heavy Higgs Productions at $\gamma \gamma$ Colliders

TL;DR

This paper investigates the production of multiple neutral Higgs bosons in multi-Higgs doublet models at gamma-gamma colliders, highlighting how helicity measurements of top-quark pairs can reveal their CP properties, especially with nearly degenerate masses.

Contribution

It introduces a method using helicity observations of top-pairs to distinguish CP properties of Higgs bosons in multi-Higgs models at gamma-gamma colliders.

Findings

Helicity measurements effectively differentiate CP properties.

Helicity analysis is especially useful for nearly degenerate Higgs masses.

The study enhances understanding of Higgs CP characterization at colliders.

Abstract

Multi-Higgs doublet models include more than one neutral Higgs bosons, some of which have different properties under a CP transformation. We examine their productions at $\gamma \gamma$ colliders. It is found that helicity observations of final top-pairs can be powerful tools to distinguish their CP properties, especially when masses of the Higgs bosons are almost degenerate.