Gravitino decay and the cosmic gamma-ray background

Details Gravitino decay and the cosmic gamma-ray background Gravitino decay and the cosmic gamma-ray background

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvl..56.2551s&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 56, June 9, 1986, p. 2551; Authors' Reply, p. 2552.

Astronomy and Astrophysics

Astronomy

7

Annihilation Reactions, Background Radiation, Cosmic Rays, Gamma Ray Astronomy, Gravitinos, Radioactive Decay, Black Body Radiation, Energy Spectra, Red Shift

Scientific paper

It is argued that the cosmic gamma-ray background (CGB) spectrum does not exhibit evidence for the decay of light gravitinos, in contradiction to the suggestion by Olive and Silk (1985), who observed a bump near 1 MeV in the CGB radiation spectrum. It is suggested that better fits to the CGB spectrum would be provided by mechanisms generating a power-law spectrum which is flattened below about 2 MeV. Olive and Silk maintain that the decays of a long-lived particle such as the gravitino may be responsible for features in the gamma-ray spectrum near 1 MeV.

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