Limit on gamma(pi-0-]nu-nu-bar) from SN1987A
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Elsevier B.V.
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Abstract
We consider the possible neutrino emission from SN1987A generated through the process γγ→π0→νν, which is permitted when the neutrinos have a right-handed component. This energy-loss mechanism is consistent with the supernova neutrino observations if the decay rate I (π0→νν̄) < (0.15-6.3) × 10-13 eV. When the reaction π0→νν̄ is mediated by weak gauge bosons the limit on the decay rate allows us to obtain constraints on neutrino masses, mv<5-27 keV, depending on the core temperature.
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English
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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 258, n. 1-2, p. 227-230, 1991.
