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, $h_1$ 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 ($a_1\to {\chi }_1^0{\chi }_1^0)$ are larger than $50\%$, and can reach a $100\%$ level in the latter case. Furthermore, the branching ratio of the $h_2\to a_1{a}_1$ 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.

Comments: 12 pages, 4 figures