Associated Higgs boson production with $Z$ boson in the minimal $U(1{)}_X$ extended Standard Model

Abstract

The minimal $U(1{)}_X$ extension of the Standard Model (SM) is a simple and well-motivated extension of the SM, which supplements the SM with the seesaw mechanism for naturally generating the light neutrino masses and offers various interesting phenomenologies. In the model, the $U(1{)}_X$ charge of each SM field is characterized by the $U(1{)}_X$ charge of the SM Higgs doublet with a free parameter $x_H$. Due to the $U(1{)}_X$ charge of the Higgs doublet, the Higgs boson has a trilinear coupling with the $Z$ boson and the $U(1{)}_X$ gauge boson ($Z^{\prime }$). With this coupling, a new process for the associated Higgs boson production with a $Z$ boson arises through a $Z^{\prime }$ boson in the $s$-channel at high energy colliders. In this paper, we calculate the associated Higgs boson production at high energy colliders and show interesting effects of the new $Z^{\prime }$ boson mediated process, which can be tested in the future.

arXiv comment19 Pages, 9 Figures

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