The annihilation process vv-->γγ with massive neutrinos in cosmology

Details The annihilation process vv-->γγ with massive neutrinos in cosmology The annihilation process vv-->γγ with massive neutrinos in cosmology

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982nuphb.207..269c&link_type=abstract

Nuclear Physics B, Volume 207, Issue 2, p. 269-287.

Physics

Nuclear Physics

16

Scientific paper

The amplitude for vv-->γγ is shown to be dominated by the term linear in the neutrino mass mv for mv >~ 1 eV and energies <~ 1 MeV. This term involves the AVV triangle function, for which a representation in terms of elementary functions is found. We give an improved estimate of energy loss from stars via γγ-->vv. Structures of gravitationally bound neutrinos on a cosmological scale, ``neutrino stars'', are studied. On that basis it is shown that vv-->γγ must be unimportant in cosmological particle equilibria unless mv>>30 eV.

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