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 (4)

• Novel Higgs Decays and Dark Matter in the E(6)SSM
• Bino Dark Matter and Big Bang Nucleosynthesis in the Constrained E6SSM with Massless Inert Singlinos
• Novel gluino cascade decays in E6 inspired models
• Discovering $E_6$ SUSY models in gluino cascade decays at the LHC