Higgs effects on the relic supersymmetric particle density

Details Higgs effects on the relic supersymmetric particle density Higgs effects on the relic supersymmetric particle density

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phlb..245..545e&link_type=abstract

Physics Letters B, Volume 245, Issue 3-4, p. 545-555.

Physics

36

Scientific paper

We explore in the minimal supersymmetric extension of the standard model the effects of Higgs exchange on the cosmological relic density ϱ~ of the lightest supersymmetric particle (LSP), taking into account the constraints on the supersymmetric Higgs masses imposed by LEP. We find in general a significant enlargement of the region of parameter space in which ϱ~<ϱ~70 = 10-29 g cm-3, the closure density if the Hubble constant is 70 km s-1 Mpc-1. This effect is potentially important if the ratio of Higgs VEVs tan β ≡ υt/υb~2-4 as in many realistic models. The restricted region of parameter space in which closure density is obtained for a Hubble constant between 50 and 70 km s-1 Mpc-1 is particularly sensitive to the Higgs contribution.

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