Astrophysical constraints on massive unstable neutral relic particles

Details Astrophysical constraints on massive unstable neutral relic particles Astrophysical constraints on massive unstable neutral relic particles

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nuphb.373..399e&link_type=abstract

Nuclear Physics B, Volume 373, Issue 2, p. 399-437.

Physics

Nuclear Physics

261

Scientific paper

There has recently been renewed interest in massive neutral dark-matter particle candidates with masses greater than ~ 1 TeV which may be unstable. We re-evaluate the constraints on such particles from the possible effects of their decays on the spectrum of the microwave background-radiation and the primordially synthesised abundances of the light elements, from observations of the diffuse gamma-ray background radiation, and from searches for muons and neutrinos in nucleon-decay and cosmic-ray detectors. We find that such unstable neutral relics may well have the cosmological critical density if their lifetime exceeds ~ 1016 yr. We illustrate our arguments by applying them to technicolour baryons and to ``cryptons'' in superstring-inspired models.

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