Charged Higgs production at photon colliders in 2HDM-III

TL;DR

This paper investigates the production of charged Higgs bosons via photon collisions in a general two-Higgs-doublet model, highlighting potential enhancements over MSSM and implications for Higgs sector structure.

Contribution

It analyzes the loop-mediated production of A^0 in photon collisions within 2HDM-III and explores its decay channels, proposing a novel pathway for charged Higgs detection.

Findings

Photon-photon collisions can produce A^0 with enhanced rates in 2HDM-III.

The decay A^0 → W^- H^+ is significant at tree level in 2HDM-III.

Detection of charged Higgs could reveal multiple Higgs sector multiplets.

Abstract

We study charged Higgs production in the process $\gamma\gamma\to A^0\to W^- H^+$. The processes $\gamma\gamma\to A^0$ are loop mediated in a 2HDM. This is due to the fact that photons only couple directly to charged particles and the Higgs only couples to particles with mass acquired via Higgs mechanism. Although in MSSM the contribution from the process $\gamma\gamma\to A^0$ is too small, it has been found that in a more general 2HDM it could be enhanced. On the other hand, the boson $A^0$ can decay in $W^- H^+$ at tree level and the charged Higgs can decay in fermions. So, the whole process under study is $\gamma\gamma\to A^0\to (W^-\to l\nu) (H^+\to f_if_j)$ in 2HDM-III. Evidence about charged Higgs existence could demonstrate that structure of the Higgs sector has several multiplets.