Abstract
We study an extension of the minimal supersymmetric standard model (MSSM) with additional right-handed singlet neutrino superfields. While such an extension incorporates a mechanism for the neutrino mass, it also opens up the possibility of having the right-sneutrinos (\( \tilde{\nu} \)) as the lightest supersymmetric particle (LSP). In this work, we focus on the viability of rather small (≲500 GeV) higgsino mass parameter (μ), an important ingredient for “naturalness”, in the presence of such a LSP. For simplicity, we assume that the bino and wino mass parameters are much heavier; thus we only consider (almost) pure and compressed higgsino-like states, with small \( \mathcal{O}\left(1{0}^{-2}\right) \) gaugino admixture which nevertheless still affect the decay of the low-lying higgsino-like states, thus significantly affecting the proposed signatures at colliders. Considering only prompt decays of the higgino-like states, especially the lightest chargino, we discuss the importance of leptonic channels consisting of up to two leptons with large missing transverse energy to probe this scenario at the Large Hadron Collider (LHC). In addition we also comment on the dark matter predictions for the studied scenario.
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Chatterjee, A., Dutta, J. & Rai, S.K. Natural SUSY at LHC with right-sneutrino LSP. J. High Energ. Phys. 2018, 42 (2018). https://doi.org/10.1007/JHEP06(2018)042
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DOI: https://doi.org/10.1007/JHEP06(2018)042