Abstract
We investigate the potential collider signatures of singly-charged and doubly-charged Higgs bosons such as those arising in minimal left-right symmetric models. Focusing on multileptonic probes in the context of the high-luminosity run of the Large Hadron Collider, we separately assess the advantages of the four-leptonic and trileptonic final states for a representative benchmark setup designed by considering a large set of experimental constraints. Our study establishes possibilities of identifying singly-charged and doubly-charged scalars at the Large Hadron Collider with a large significance, for luminosity goals expected to be reached during the high-luminosity phase of the Large Hadron Collider. We generalise our results and demonstrate that existing limits can in principle be pushed much further in the heavy mass regime.
Highlights
The Standard Model of particle physics has been established as the most successful theory describing the elementary particles and their interactions, especially after the discovery of a Standard-Modellike Higgs boson at the Large Hadron Collider (LHC) in 2012 [1,2]
We investigate the potential collider signatures of singly charged and doubly charged Higgs bosons such as those arising in minimal left-right symmetric models
We have focused on the multileptonic collider signatures of this scalar sector and estimated how the LHC could be sensitive to it in the upcoming years
Summary
The Standard Model of particle physics has been established as the most successful theory describing the elementary particles and their interactions (with the exception of gravity), especially after the discovery of a Standard-Modellike Higgs boson at the Large Hadron Collider (LHC) in 2012 [1,2]. Focusing on minimal model building possibilities (and on type I and type II seesaws), the extended gauge symmetry is spontaneously broken down to the Standard Model gauge symmetry thanks to a scalar field that lies in the adjoint representation of SUð2ÞR or SUð2ÞL for a type I and type II seesaw mechanism, respectively This field acquires a nonvanishing vacuum expectation value that yields neutrino mass generation. The neutral component of the left-handed (ΔL) and right-handed (ΔR) Higgs triplets both acquire nonvanishing vacuum expectation values vL;R ≠ 0 This opens up certain decay modes that are forbidden when vL 1⁄4 0 (as for a type I seesaw mechanism) and that could be used as handles on distinguishing a vL 1⁄4 0 from a vL ≠ 0 scenario.
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