Dark matter neutrinos must come with degenerate masses

被引:42
作者
Minakata, H [1 ]
Yasuda, O [1 ]
机构
[1] Tokyo Metropolitan Univ, Dept Phys, Hachioji, Tokyo 1920397, Japan
关键词
hot dark matter; neutrino oscillation; CHOOZ;
D O I
10.1016/S0550-3213(98)00299-5
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
It has been known that there are two schemes in the framework of three flavor neutrinos to accommodate the global features of the hot dark matter neutrinos, the solar neutrino deficit and the atmospheric neutrino anomaly in a manner consistent with terrestrial neutrino experiments, i.e,, hierarchical mass neutrinos and almost degenerate neutrinos. We demonstrate that the recent result by the CHOOZ experiment excludes the scheme of hierarchical neutrinos. We also point out in the scheme of almost degenerate neutrinos that if neutrinos are Majorana particles then the double beta decay experiments must see positive signals on their way to reach a limit more stringent than the present one by a factor of 5. (C) 1998 Elsevier Science B,V.
引用
收藏
页码:597 / 610
页数:14
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