ON THE IMPLICATIONS OF A 17 KEV NEUTRINO

被引：22

作者：

HIME, A

PHILLIPS, RJN

ROSS, GG

SARKAR, S

机构：

[1] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND

[2] UNIV OXFORD,DEPT THEORET PHYS,OXFORD OX1 3NP,ENGLAND

来源：

PHYSICS LETTERS B | 1991年 / 260卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(91)91629-A

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss the implications of the recent measurement of a 17 keV mass component in the electron neutrino sector. Such a heavy state must decay in order to be compatible with cosmology; this requires states additional to those of the standard model. The most likely candidates are either majorons, allowing the decay into massless weakly interacting scalars, or singlet neutrinos, allowing the decay via the Z into light neutrinos. We show that in the latter case there is a lower bound on the lifetime in conflict with the cosmological constraints on this decay channel and on the photon plus neutrino decay channel which is also present. The extensions of the standard model needed to reduce the lifetime are considered. We analyze the mass matrix, playing particular regard to the singlet neutrino case, and discuss how it might be extended to explain the solar neutrino deficit.

引用

页码：381 / 388

页数：8

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