Bounds on exotic-particle interactions from SN 1987A

Physics

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Gravitational Collapse, Neutrinos, Particle Emission, Particle Interactions, Supernova 1987A, Stellar Cores, Stellar Interiors

Scientific paper

The observation of a neutrino pulse from the supernova SN 1987A constrains the production of light exotic particles in the protoneutron star. A new bound on the axion decay constant is derived, f(a) of greater than about 10 to the 10th GeV. If right-handed (RH) neutrinos exist, 'RH Fermi constant' is G(RH) of less than about 10 exp-4 G(F), two orders of magnitude below laboratory bounds. The Dirac mass of hvm can be constrained below laboratory limits. The Dirac mass of the mu-neutrino can be constrained below laboratory limits.

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