Single Higgs-boson production at a photon-photon collider: general 2HDM versus MSSM

TL;DR

This paper analyzes single Higgs boson production at a photon collider within the 2HDM and MSSM frameworks, showing potential for distinguishing models and overcoming experimental challenges at the LHC.

Contribution

It provides detailed cross section calculations and phenomenological analysis comparing 2HDM and MSSM Higgs production at photon colliders.

Findings

Production rates up to 10^4 events for CP-even states

Significant deviations from SM expectations in certain parameter regions

Potential to distinguish MSSM from non-supersymmetric Higgs bosons

Abstract

We revisit the production of a single Higgs boson from direct \gamma \gamma -scattering at a photon collider. We compute the total cross section \sigma(\gamma \gamma \to h) (for h=h0, H0, A0), and the strength of the effective g_{h \gamma \gamma} coupling normalized to the Standard Model (SM), for both the general Two-Higgs-Doublet Model (2HDM) and the Minimal Supersymmetric Standard Model (MSSM). In both cases the predicted production rates for the CP-even (odd) states render up to 10^4 (10^3) events per 500 \invfb of integrated luminosity, in full consistency with all the theoretical and phenomenological constraints. Depending on the channel the maximum rates can be larger or smaller than the SM expectations, but in most of the parameter space they should be well measurable. We analyze how these departures depend on the dynamics underlying each of the models, supersymmetric and non-supersymmetric, and highlight the possible distinctive phenomenological signatures. We demonstrate that this process could be extremely helpful to discern non-supersymmetric Higgs bosons from supersymmetric ones. Furthermore, in the MSSM case, we show that \gamma\gamma-physics could decisively help to overcome the serious impasse afflicting Higgs boson physics at the infamous "LHC wedge".