Diffuse cosmic gamma-ray background as a probe of cosmological gravitino regeneration and decay

Keith A. Olive, Joseph Silk

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

We predict the presence of a spectral feature in the isotropic cosmic gamma-ray background associated with gravitino decays at high red shifts. With a gravitino abundance that falls in the relatively narrow range expected for thermally regenerated gravitinos following an inflationary epoch in the very early universe, gravitinos of mass several gigaelectronvolts are found to yield an appreciable flux of 110-MeV diffuse gamma rays.

Original languageEnglish (US)
Pages (from-to)2362-2365
Number of pages4
JournalPhysical Review Letters
Volume55
Issue number21
DOIs
StatePublished - Jan 1 1985

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