Prospects of Neutral Higgs boson decays in the NMSSM

TL;DR

This paper analyzes the decay patterns of light Higgs bosons in the NMSSM, highlighting unique decay channels that could serve as signatures of this model beyond the Standard Model.

Contribution

It provides detailed calculations of Higgs decay branching ratios in the NMSSM, revealing potential dominant decay modes and distinctive signatures.

Findings

$a_1$ can decay into charginos and neutralinos with over 50% probability.

$h_2$ can decay into two $a_1$ bosons with nearly 100% branching ratio.

Certain decay channels are unique indicators of the NMSSM.

Abstract

In this paper, we present the branching ratios of the two lightest CP-even Higgses, $h_1$ and $h_2$, and of the lightest CP-odd Higgs, $a_1$, in the context of the Non-Minimal Supersymmetric Standard Model (NMSSM). We find that for some regions of the parameter space, the branching fractions of $a_1$ into the lightest charginos ($a_1\to \chi^+_1\chi^-_1)$ and neutralinos ($a_1\to \chi^0_1\chi^0_1)$ are larger than $50\%$, and can reach a $100 \%$ level in the latter case. Furthermore, the branching ratio of the $h_2\to a_1a_1$ can be equal to unity for all masses of $h_2$ when it is a pure singlet. The above unusual channels are hallmarks of the existence of the NMSSM.