Prospects of neutral Higgs boson decays in the NMSSM

Abstract

In this paper, we present the branching ratios of the two lightest CP-even Higgses, h1 and h2, and the lightest CP-odd Higgs, a1, in the context of the Next-to-Minimal Supersymmetric Standard Model (NMSSM). We find that for some regions of the parameter space, the branching fractions of a1 into the lightest charginos (a1→χ1+χ1-) and neutralinos (a1→χ10χ10) are larger than 50%, and can reach a 100% level in the latter case. Furthermore, the branching ratio of the h2→a1a1 can be equal to unity for all h2 masses when it is a pure singlet. The above unusual channels are hallmarks of the existence of the NMSSM.