Singlino dominated LSP as CDM candidate in supersymmetric models with an extra U(1)

Abstract

We consider a singlino dominated neutralino in supersymmetric models with an extra U(1). In case both the $\mu$ term and also the $Z^{\prime }$ mass are generated by the vacuum expectation value of the scalar component of the same singlet chiral superfield, generically the lightest neutralino is not expected to be dominated by the singlino. However, if the gaugino corresponding to the extra U(1) is sufficiently heavy, the lightest neutralino can be dominated by the singlino and still satisfy the constraints resulting from the $Z^{\prime }$ phenomenology. We assume a supersymmetry breaking scenario in which the extra U(1) gaugino can be much heavier than other gauginos. In that framework we show that the singlino dominated lightest neutralino may be a good candidate for dark matter in a parameter space where various phenomenological constraints are satisfied.

25 pages, 6 figures, title is changed, introduction is extended, sec.2 is moved to appendix, some references are added, published version

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Cited by in corpus (12)

• The Next-to-Minimal Supersymmetric Standard Model
• Neutrino masses and CDM in a non-supersymmetric model
• Dark Matter in a Constrained NMSSM
• Leptogenesis and dark matter unified in a non-SUSY model for neutrino masses
• Precision measurements, dark matter direct detection and LHC Higgs searches in a constrained NMSSM
• Probing U(1) extensions of the MSSM at the LHC Run I and in dark matter searches
• Supersymmetric extra U(1) models with a singlino dominated LSP
• Affleck-Dine leptogenesis in the radiative neutrino mass model
• SUSY breaking based on Abelian gaugino kinetic term mixings
• Higgs Bosons in supersymmetric U(1)' models with CP Violation
• Electric Dipole Moments in U(1)' Models
• Phenomenological features in a model with non-universal gaugino CP phases