Simplified model approach to same-sign dilepton resonances

Abstract

We discuss same-sign dilepton resonances in the simplified model approach. The relevant SU(3) . For simplicity, we only consider a spin 0 scalar, which is typically referred to as a doubly charged Higgs in the literature. We consider the three simplest cases where the doubly charged Higgs resides in a singlet, doublet or triplet SU(2) L representation. We discuss production and decay of such a doubly charged Higgs, summarize the current direct search limits, and obtain mass limits in the cases of singlet and doublet for the first time. We also present a complete set of updated indirect search limits. We study the discovery potential at the Large Hadron Collider (LHC) with center of mass energies 7 and 14 TeV for the dominant Drell-Yan pair production with H ±± decay in the ee and µµ channels. We find that at 7 TeV, the LHC with 10 fb −1 luminosity can probe mass of the doubly charged Higgs up to 380 GeV assuming 100% decay to leptons. At 14 TeV, the LHC with 100 fb −1 luminosity can reach a mass of up to 800 GeV. *

Search for doubly charged Higgs bosons using the same-sign diboson mode at the LHC

“…Recently, the authors of Ref. [24] have performed a systematic study of the leptonic channels of a doubly charged Higgs boson in the SU (2) L singlet, doublet, and triplet representations at the LHC.…”

LHC bounds on lepton number violation mediated by doubly and singly-charged scalars

“…This stands for an SU(2) L singlet κ ++ with hypercharge 2 [29,32,86], a doublet χ = (χ ++ , χ + ) with Y = 3/2 [87][88][89][90], a triplet ∆ = (∆ ++ , ∆ + , ∆ 0 ) with Y = 1 mediator of the see-saw of type II [44][45][46][47][48][49], a quadruplet Σ = (Σ ++ , Σ + , Σ 0 , Σ − ) with Y = 1/2 [91], and a quintuplet which we will assume to be real Ω = (Ω ++ , Ω + , Ω 0 , Ω − , Ω −− ) with Y = 0. The lowest order gauge invariant operators coupling the doubly-charged component of these multiplets to a pair of same-sign charged leptons after EWSB are of dimension 4 for κ and ∆, 5 for χ and Σ, and 6 for Ω, respectively [82]:…”

Light doubly charged Higgs boson via the $$WW^*$$ W W ∗ channel at LHC

“…We find that H ±± should be observable at the 14 TeV LHC with 10−30 fb −1 integrated luminosity. The last but not the least, here we take a simplified model approach and discuss the search for H ±± in the simplified model at the LHC, which makes our result less model-dependent and can be conveniently translated into other specific models [23,53]. This paper is organized as follows.…”

“…lighter than 2m W but above m W . Extensive attentions are paid on the decay modes of H ±± dominated by either the SSDL [21][22][23] or di-W [24][25][26][27], or the cascade decay among scalar fields [28][29][30][31][32][33][34][35]. For a comprehensive discussion on the relative importance of the decay channels of H ±± , see Ref.…”