Can supernovae exclude neutrinos more massive than 30 eV?

Details Can supernovae exclude neutrinos more massive than 30 eV? Can supernovae exclude neutrinos more massive than 30 eV?

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrvl..58.2146d&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 58, May 18, 1987, p. 2146-2149.

Physics

17

Neutrinos, Neutron Stars, Positron Annihilation, Stellar Physics, Supernovae, Galaxies, Nuclear Fusion

Scientific paper

Neutron stars formed in supernovae are very intense sources of neutrinos of all species and masses ≤100 MeV. If such neutrinos decayed via νH → νe+e-+e- inside the Galaxy, annihilation of the trapped positrons would yield a 511-keV line exceeding the experimental bounds by many orders of magnitude. This allows to exclude decay lifetimes in the range 104-1015sec for neutrinos of mass 1 - 100 MeV. The result corroborates and extends earlier astrophysical bounds.

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