Massive particles as a probe of the early universe

Details Massive particles as a probe of the early universe Massive particles as a probe of the early universe

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982nuphb.208..501d&link_type=abstract

Nuclear Physics B, Volume 208, Issue 3, p. 501-508.

Physics

Nuclear Physics

9

Scientific paper

The survival density of stable massive particles with general annihilation cross section is calculated in a cosmological model that expands anisotropically in its early stages (t<1 s). It is shown that the faster average expansion rate leaves a larger present density of surviving particles that in a model that expands isotropically. This allows particle survival calculations to be employed as a probe of the dynamics of the early universe prior to nucleosynthesis. Several examples of heavy lepton, nucleon and monopole survival are discussed.

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