DIRECT NEUTRINO MASS MEASUREMENTS

被引：16

作者：

OTTEN, EW ^{[1
]}

机构：

[1] UNIV MAINZ, INST PHYS, D-55099 MAINZ, GERMANY

来源：

NUCLEAR PHYSICS B | 1995年

关键词：

D O I：

10.1016/0920-5632(94)00729-F

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：

The paper reports on recent progress and developments since the neutrino '92 conference in the search for finite neutrino masses by direct mass measurements. Regarding the mass of mu- and tau-neutrino experiments have been finished and come up with somewhat improved upper bounds; the negative m(2)-value for the mu-neutrino could be removed mostly. Indications of a 17 keV neutrino component in beta-decay spectra have been disproved by a number of alternative experiments as well as by reanalysis of part of the original data. Regarding the electron neutrino mass, measurements by magnetic spectrometers are phasing out in favour of electrostatic filters with magnetic guiding fields. These experiments yielded so far a published upper limit of 7.2 eV/c(2), and a further improved one of 4.5 eV/c(2) has been communicated to this conference. The problem of negative m(2)-values is discussed in some detail.

引用

页码：26 / 35

页数：10

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