Higgs boson decay $h^0\to m_{V}Z$ in the BLMSSM

Abstract

In the framework of BLMSSM, the Higgs decays $h^0\to Z\gamma$ and $h^0\to m_{V}Z$ are studied where $m_V$ represents a vector meson($\rho ,\omega ,\varphi ,J/\psi ,{\rm Y}$ etc.). Corrections to the CP-even and CP-odd $h^0\gamma Z$ couplings occur via loop diagrams where new particles are involved. Actually both of them obviously influence the decay rates of $h^0\to Z\gamma$ and $h^0\to m_{V}Z$. Concretely, our obtained numerical result shows that the decay width of $h^0\to Z\gamma$ can be 1.3 times larger than the prediction of the Standard Model(SM). For the light mesons ($\rho ,\omega$), the corrections to $h^0\to m_{V}Z$ are within $15\%\sim 20\%$ still consistent with the SM results. The results of this work would encourage a detection on $h^0\to Z\gamma$ at LHC for exploring new physics beyond SM.

Comments: accepted by PRD