Relic density of dark matter in the NMSSM

Details Relic density of dark matter in the NMSSM Relic density of dark matter in the NMSSM

2005-05-16

arxiv.org/abs/hep-ph/0505142v2

JCAP 0509 (2005) 001

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 8 figures; one reference added and minor change in acknowledgements

Scientific paper

10.1088/1475-7516/2005/09/001

We present a code to compute the relic density of dark matter in the Next-to-Minimal Supersymmetric Standard Model (NMSSM). Dominant corrections to the Higgs masses are calculated with NMHDECAY as well as theoretical and collider constraints. All neutralino annihilation and coannihilation processes are then computed with an extended version of micrOMEGAs, taking into acount higher order corrections to Higgs vertices. We explore the parameter space of the NMSSM and consider in particular the case of a bino LSP, of a mixed bino-higgsino LSP and of a singlino LSP. As compared to the MSSM, neutralino annihilation is often more efficient as it can take place via (additional) Higgs resonances as well as annihilation into light Higgs states. Models with a large singlino component can be compatible with WMAP constraints.

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