Search for light gauge boson $Z_{\mu \tau }^{}$ via $t\bar{t}{h}_1^{}$ production at LHC

Abstract

We consider the production of the new gauge boson $Z_{\mu \tau }^{}$ predicted by the ${U(1)}_{L_{\mu }^{}-L_{\tau }^{}}$ model via SM-like Higgs boson $h_1^{}$ decaying in the $t\bar{t}{h}_1^{}$ production at LHC. Considering the current constraints on the relevant free parameters, we calculate its production cross section and further investigate the possibility of detecting $Z_{\mu \tau }^{}$ through the process $pp\to t(\to bjj)\bar{t}(\to \bar{b}{l}^{-}{\bar{\nu }}_l)h_1(\to Z_{\mu \tau }{Z}_{\mu \tau })\to b\bar{b}jj{l}^{-}{\bar{\nu }}_l+/E_T$ at LHC. We find that $Z_{\mu \tau }^{}$ might be detected via this process at LHC with high integrated luminosity.

Comments: There are some errors in this paper that need to be modified. And some of the statements need to be adjusted properly