Lightest Higgs boson decays $h\rightarrow MZ$ in the $\mu$ from $\nu$ supersymmetric standard model

TL;DR

This paper investigates the decay of the lightest Higgs boson into a vector meson and Z boson within the $mbda$ from $ u$ supersymmetric standard model, highlighting potential large new physics effects detectable at future colliders.

Contribution

It introduces the effects of Higgs-sneutrino mixing in the $mbda$ from $ u$SSM on Higgs decay modes, extending predictions beyond the MSSM.

Findings

Large new physics contributions to $h\rightarrow MZ$ and $h\rightarrow \gamma\gamma$ decays.

Potential detectability of these effects at future 100 TeV colliders.

Parameter space where the $mbda$ from $ u$SSM significantly alters Higgs decay signals.

Abstract

We study the lightest Higgs boson decays $h\rightarrow MZ$ in the $\mu$ from $\nu$ supersymmetric standard model ($\mu\nu$SSM), where $M$ is a vector meson $(\rho,\omega,\phi,J/\Psi,\Upsilon)$. Compared to the minimal supersymmetric standard model (MSSM), the $\mu\nu$SSM introduces three right-handed neutrino superfields, which lead to the mixing of the Higgs doublets with the right-handed sneutrinos. The mixing affects the lightest Higgs boson mass and the Higgs couplings. In suitable parameter space, the $\mu\nu$SSM can give large new physics (NP) contributions to the signal strengths of $h\rightarrow MZ$ and $h\rightarrow \gamma\gamma$, which may be detected by a 100 TeV collider or the other future high energy colliders.