Abstract
We investigate an extension of the Standard Model with one additional triplet of scalar bosons. Altogether, the model contains four Higgs bosons. We analyze the associated production of the doubly charged scalar with the Standard Model gauge bosons and the remaining Higgs bosons of the model, which are: the light (SM) and heavy neutral scalars and a singly charged scalar. We estimate, in the context of the present (HL–LHC) and future (FCC–hh) hadron colliders, the most promising processes in which a single produced doubly charged Higgs boson is involved.
Highlights
Experimental evidence of the Higgs boson’s existence, found at the Large Hadron Collider (LHC) [1,2], was a quantum leap in particle physics history
Many Beyond the Standard Model (BSM) theories assume the existence of additional Higgs bosons [9,10]
Processes involving H++ lead to the lepton flavor violation (LFV) as well as lepton number violating (LNV) processes, which can be probed at hadron colliders
Summary
Experimental evidence of the Higgs boson’s existence, found at the Large Hadron Collider (LHC) [1,2], was a quantum leap in particle physics history. The triplet vacuum expectation value (VEV) is very small, whereas H++ mass can be at the level of a few hundred GeV Such masses of H++ scalars can be probed at the hadron colliders. The ATLAS collaboration set the lower bound on the mass of doubly charged scalar in√the range of 770–870 GeV, assuming 100% branching ratios of leptonic modes [39] with s = 13 TeV. All relevant phenomenological constraints on the non-standard neutral and charged Higgs scalar parameters connected with HTM are taken into account Among those worth mentioning are neutrino oscillations, low energy experiments, the bound on the ρ parameter, limits on HTM contributions to (g − 2)μ and lepton LFV processes, as well as limits on HTM parameters coming √from collider e+e− and e−e− sca√tterings.
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