Charged Higgs in MSSM and Beyond

Abstract

We conduct a numerical study over the constrained MSSM (CMSSM), Next-to-MSSM (NMSSM) and $U(1)$ extended MSSM (UMSSM) to probe the allowed mass ranges of the charged Higgs boson and its dominant decay patterns, which might come into prominence in near future collider experiments. {We present results obtained from a limited scan for CMSSM} as a basis and compare its predictions with the extended models. We observe within our data that a wide mass range is allowed as $0.5(1)\lesssim m_{H^{\pm }}\lesssim 17$ TeV in UMSSM (NMSSM). We find that the dominant decay channel is mostly $H^{\pm }\to tb$ such that $\mathrm{BR}(H^{\pm }\to tb)\sim 80\%$. While this mode remains dominant over the whole allowed parameter space of CMSSM, we realize some special domains in the NMSSM and UMSSM, in which $\mathrm{BR}(H^{\pm }\to tb)\lesssim 10\%$. In this context, the decay patterns of the charged Higgs can play a significant role to distinguish among the SUSY models. In addition to the $tb$ decay mode, we find that the narrow mass scale in CMSSM allows only the decay modes for the charged Higgs boson to $\tau \nu$ ($\sim 16\%$), and their supersymmetric partners $\tilde{\tau }\tilde{\nu }$ ($\sim 13\%$). On the other hand, it is possible to realize the mode in NMSSM and UMSSM in which the charged Higgs boson decays into a chargino and neutralino pair up to about $25\%$. {This decay mode requires non-universal boundary conditions within the MSSM framework to be available, since CMSSM yields $\mathrm{BR}(H^{\pm }\to {\tilde{\chi }}_1^0{\tilde{\chi }}_1^{\pm })\lesssim 1\%$.} It can also be probed in near future collider experiments through the missing energy and CP-violation measurements...

arXiv comment29 pages, 11 figures

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