Abstract
The Georgi-Machacek Model allows for a large triplet vacuum expectation value (vev) with a custodial symmetric scalar potential. This manifestly leads to large charged Higgs coupling to SM fermions thus enhancing the detection probability of the model at the Large hadron collider. We show that the latest bound from LHC searches on singly charged Higgs scalar decaying to top and bottom quark restricts the triplet vev from above. We demonstrate that the combined limit from theoretical constraints and the latest Higgs data together with this charged Higgs bound can already curb the model parameter space significantly. Further, we propose the charged Higgs decaying to $W^{\pm}$ boson and a SM-like Higgs as a prospective channel to probe the yet unbounded model parameter space at the future run of the LHC. A simple cut-based analysis for this channel has been made showing the parameter region that can be probed with $5\sigma$ significance at the high luminosity LHC run.
Highlights
The Standard Model (SM) of particle physics has achieved its triumph after the discovery of a 125 GeV scalar resonance at the Large Hadron Collider (LHC) [1,2] experiment
We consider the GM model as a preferred variant of scalar triplet extension of the SM that preserves the custodial symmetry allowing for a larger triplet vev unlike the usual Higgs triplet model (HTM)
Such large triplet vev leads to interesting search prospects for the singly charged scalar of the model that can decay to SM fermion with large coupling
Summary
The Standard Model (SM) of particle physics has achieved its triumph after the discovery of a 125 GeV scalar resonance at the Large Hadron Collider (LHC) [1,2] experiment. The possibility of having an exotic particle in the realm of current collider reach still cannot be discarded and it may just need a closer look at the present LHC data. A charged scalar particle is one of the appealing exotic candidates in particle phenomenology and has been searched for a long time.
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