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

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

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phrvl..55.2362o&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 55, Nov. 18, 1985, p. 2362-2365.

Astronomy and Astrophysics

Astronomy

28

Background Radiation, Gamma Rays, Gravitinos, Astronomical Models, Cosmology, Decay

Scientific paper

The authors predict the presence of a spectral feature in the isotropic cosmic gamma-ray background associated with gravitino decays at high redshifts. 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 1 - 10-MeV diffuse gamma rays.

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