利用超新星爆发测量电子中微子静止质量

MEASUREMENT OF ELECTRON NEUTRINO MASS BY SUPERNOVA NEUTRINO BURSTS

综述了中微子静止质量mνe的测量方法与结果 ,侧重介绍了超新星SN87A中微子测量的结果 ,即得到具有能量为 8MeV和 36MeV的中微子飞行时间差 ,对于Kamiokande ,IMB ,Bakson分别为 1 9s ,6s和 9s,由此给出电子中微子静止质量上限为 14eV[95 %置信水平 (C L ) ].并且描述了计划建造的新型太阳中微子能谱仪 ,该谱仪在观测太阳中微子能谱的同时 ,将兼测超新星中微子 ,提供了在mνe<1eV范围内测量中微子静止质量的可能性 .

The status of neutrino mass measurements is reviewed, with particular mention of measurements of the supernova 1987A neutrino bursts. From the data analyses of Kamiokande, IMB and Bakson the upper limit of the electron neutrino mass is found to be less than 14 eV (95% C.L.). A description is given of the new solar neutrino spectrometer to be built which will detect solar neutrinos as well as measure the mass of supernova neutrinos. The possibility of detection of a neutrino mass<1 eV is also discussed.