Abstract
We explore the possibility of having superpartners of triplet Higgs bosons, named as ‘triplinos’. They form a part of light neutralinos and charginos in a Y=0 extended supersymmetric Standard Model. For this model such electroweakinos do not have direct couplings to the Standard Model fermions. On top of that, due to very compressed spectrum for lighter neutralinos and charginos, their decay products coming from three body decays are very soft and thus can evade the current collider bounds. These decays are particularly interesting since they give rise to displaced leptonic signatures. We categorise the parameter space, while exploring different displaced decay possibilities. A PYTHIA based simulation has been performed to find out the displaced charged lepton, jet and b-jet final states at the LHC with center of mass energy of 14 TeV.
Highlights
In Sc 2 we focus on the phenomenology of the triplino like second lightest neutralino χ20 chosen as next to LSP (NLSP)
In this article we have considered the phenomenology of the electroweak gaugino sector for the Y = 0 triplet extended supersymmetric SM
Similar to Higgs sectors the phenomenology of electroweak chargino and neutralino sectors differ from MSSM and is worth exploring
Summary
Equation (2.4) below presents the neutralino mass matrix in the basis (B 0, W 0, Hd0, Hu0, T 0). Triplino mixes with Hu0 and Hd0 via the coupling λ and does not mix at all with B 0, W 0. Z χi0 is not allowed for a pure triplet-like neutralino. Such inertness of the triplino decays is important especially for triplino-like NLSP or LSP. Triplino-like chargino NLSP decays to triplino LSP. A pure triplino-bino coupling does not exist. The neutral triplino couples to bino only via the mixing with Higgsinos, which is the way the triplino-like neutralino NLSP can decay to bino-like LSP. Triplet-like neutralino (NLSP) decays with a small mass gap with LSP Decays are crucial in determining the characteristics of the neutralinos i.e., triplet-doublet-bino-wino types of neutralinos
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