STRINGENT COSMOLOGICAL BOUNDS ON INERT NEUTRINO MIXING

被引：243

作者：

ENQVIST, K ^{[1
]}

KAINULAINEN, K ^{[1
]}

THOMSON, M ^{[1
]}

机构：

[1] UNIV MANCHESTER,DEPT THEORET PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND

来源：

NUCLEAR PHYSICS B | 1992年 / 373卷 / 02期

关键词：

D O I：

10.1016/0550-3213(92)90442-E

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：

We study neutrino oscillations in the early universe induced by a non-trivial vacuum mixing between an inert SU(2) x U(1) singlet and a weakly interacting doublet neutrino. Excluded regions in the (sin2 2-theta-0 - delta-m2) plane are determined carefully for mixing involving nu(e), nu(mu) and nu(tau) neutrinos with an inert partner. The bounds are much more stringent than those obtained from earthbound experiments. Much of the large-angle MSW-solution parameter range is excluded and severe constraints are placed on the proposed 17 keV neutrino.

引用

页码：498 / 528

页数：31

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