The energy release from supernovas via the emission of Majoron-like particles is considered to obtain a constraint on the Yukawa couplings with neutrinos. In view of the observed neutrino flux from the supernova SN1987A, a forbidden region of the Yukawa coupling, 2×{}10^-53×{}10^-4, is obtained. We also consider some implications of our result to the Majoron models.
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Choi et al. (1988) studied this question.
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