Same sign trilepton as signature of charged Higgs in two Higgs doublet model

Abstract

We explored the prospect of looking for a fermiophobic charged Higgs ($\hpm$) via the same sign trilepton signal at the LHC. A fermiophobic scenario appears in the type-I two Higgs doublet model where the coupling of the $\hpm$ with the Standard Model fermions is inversely proportional to $\tb$. Almost all the experimental searches rely on the fermionic production and decay of the charged Higgs. Consequently, the limit on $\hpm$ for fermiophobic scenarios is non-existent unless $\tb$ is small. We show that for a fermiophobic case, the electroweak production of $\hpm$ is dominant for most of the parameter space. Subsequent bosonic decay of the charged and neutral Higgses give rise to the same sign trilepton signal. With a thorough phenomenological analysis, we demonstrate that the same sign trilepton signal can be an excellent complementary search to explore the high $\tb$ regions.

arXiv comment19 pages, 6 figures, 3 tables

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