标题： 超新星对轻中微子发射主要子衰变的限制 显示英文标题

标题： Supernova Bounds on Majoron-emitting decays of light neutrinos

摘要： 中微子质量来源于未规范的轻子数的自发对称性破缺，伴随着一个物理的戈德斯通玻色子，通常称为马约拉纳粒子。 在高密度的超新星介质中，即使在真空中由于小的中微子质量和/或小的非对角耦合而被抑制，马约拉纳粒子发射的中微子衰变效应也是重要的。 我们根据最近的超级神冈探测器对太阳和大气中微子的数据，重新考虑这些衰变对超新星中微子信号的影响。 我们发现，在范围$3\times 10^{-7}\lsim g\lsim 2\times 10^{-5}$或$g \gsim 3 \times 10^{-4}$的马约拉纳-中微子耦合常数被 SN1987A 的观测所排除。 然后我们讨论了超级神冈探测器和萨德伯里中微子观测站在未来银河系超新星情况下检测马约拉纳中微子相互作用的潜力。 我们发现，这些实验可以以更高的灵敏度探测马约拉纳中微子相互作用。 显示英文摘要

摘要： Neutrino masses arising from the spontaneous violation of ungauged lepton-number are accompanied by a physical Goldstone boson, generically called Majoron. In the high-density supernova medium the effects of Majoron-emitting neutrino decays are important even if they are suppressed in vacuo by small neutrino masses and/or small off-diagonal couplings. We reconsider the influence of these decays on the neutrino signal of supernovae in the light of recent Super-Kamiokande data on solar and atmospheric neutrinos. We find that majoron-neutrino coupling constants in the range $3\times 10^{-7}\lsim g\lsim 2\times 10^{-5}$ or $g \gsim 3 \times 10^{-4}$ are excluded by the observation of SN1987A. Then we discuss the potential of Superkamiokande and the Sudbury Neutrino Observatory to detect majoron neutrino interactions in the case of a future galactic supernova. We find that these experiments could probe majoron neutrino interactions with improved sensitivity.