Singlino-dominated lightest supersymmetric particle as a CDM candidate in supersymmetric models with an extra U(1)
- Institute for Theoretical Physics, Kanazawa University, Kanazawa 920-1192 (Japan)
We consider a singlino-dominated neutralino in supersymmetric models with an extra U(1). In case both the {mu} term and also the Z{sup '} 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{sup '} 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.
- OSTI ID:
- 20776689
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 73, Issue 3; Other Information: DOI: 10.1103/PhysRevD.73.035010; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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