Effects of scalar mixing in ${g}{g} \rightarrow \mbox{Higgs} \rightarrow \ga\ga$

TL;DR

This paper investigates how scalar mixing in the MSSM affects the production and decay of the lightest Higgs boson into two photons, revealing potential enhancements in cross sections that could aid discovery at colliders.

Contribution

It analyzes the impact of left-right scalar mixing on Higgs production via gluon fusion and its decay to photons, identifying regions with significant cross section enhancements.

Findings

Scalar mixing effects are generally small but can be significant in certain parameter regions.

Mixing can lead to large increases in production cross sections, improving discovery prospects.

No-mixing approximation may underestimate the Higgs signal in some scenarios.

Abstract

We discuss the effects of mixing of scalars belonging to left-- and right--chiral MSSM super--multiplets on the process ${g}{g}\rightarrow \hnl \rightarrow \ga\ga$, which is a promising channel for the discovery of the lightest CP--even MSSM Higgs boson at the LHC and the SSC. The effects of the left--right scalar mixing are small in most of parameter space. However, there exist regions where the mixing is important. Due to mixing, there can be large enhancements of the cross section in a region of parameter space where the no--mixing approximation yields a value that is too low for experimental discovery of the $\hnl$ at the LHC and the SSC.