Neutralino Dark Matter with Inert Higgsinos and Singlinos

Abstract

We discuss neutralino dark matter arising from supersymmetric models with extra inert Higgsinos and singlinos, where inert means that their scalar partners do not get vacuum expectation values. As an example, we consider the extended neutralino sector of the E${}_6$SSM, which predicts three families of Higgs doublet pairs, plus three singlets, plus a $Z^{\prime }$, together with their fermionic superpartners. We show that the two families of inert doublet Higgsinos and singlinos predicted by this model provide an almost decoupled neutralino sector with a naturally light LSP which can account for the cold dark matter relic abundance independently of the rest of the model, providing that the ratio of the two usual Higgs doublets satisfies tan beta < 2.

29 pages, 7 figures

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Cited by in corpus (10)

• Novel Higgs Decays and Dark Matter in the E(6)SSM
• GUT Physics in the era of the LHC
• Dark Matter in a Constrained $E_6$ Inspired SUSY Model
• Bino Dark Matter and Big Bang Nucleosynthesis in the Constrained E6SSM with Massless Inert Singlinos
• Novel gluino cascade decays in E6 inspired models
• Dark matter candidates in the constrained Exceptional Supersymmetric Standard Model
• Discovering $E_6$ SUSY models in gluino cascade decays at the LHC
• Monophoton signals in electron-positron colliders in a simplified E6SSM
• Leptogenesis and Dark Matter-Nucleon Scattering Cross Section in the SE6SSM
• TeV-scale leptoquark searches at the LHC and their E${}_6$SSM Interpretation