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.

arXiv commentThere are some errors in this paper that need to be modified. And some of the statements need to be adjusted properly

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