Superstring dark matter

Details Superstring dark matter Superstring dark matter

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phlb..173..270c&link_type=abstract

Physics Letters B, Volume 173, Issue 3, p. 270-278.

Physics

25

Scientific paper

It is argued that the lightest supersymmetric particle (LSP) emerging from the superstring theory is a mixture of neutral gauginos and matter fermions. Their mixing matrix is presented, calculated in a plausible minimal low-energy model abstracted from the superstring and the composition of the LSP χ is exhibited. Its relic cosmological density is computed and it is found that it lies within a factor 2 of the critical density required for closure, over a wide range of possible input parameters. Also the flux of neutrinos from LSP annihilation in the sun is computed, and it is found that it straddles the upper bound from proton decay detectors. Acceptable fluxes are obtained if mχ < mt, in which case the superstring relic can have the critical density for a present Hubble expansion rate H0 >~ 50 km/s/Mpc only if mt >~ 40 GeV.
Supported by DOE grant DE-AC02-83ER-40105.

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