The mainz neutrino mass experiment

被引：173

作者：

Bonn, J ^{[1
]}

Bornschein, B ^{[1
]}

Bornschein, L ^{[1
]}

Fickinger, L ^{[1
]}

Flatt, B ^{[1
]}

Kazachenko, O ^{[1
]}

Kovalik, A ^{[1
]}

Kraus, C ^{[1
]}

Otten, EW ^{[1
]}

Schall, JP ^{[1
]}

Ulrich, H ^{[1
]}

Weinheimer, C ^{[1
]}

机构：

[1] Univ Mainz, Inst Phys, D-55099 Mainz, Germany

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2001年 / 91卷

关键词：

D O I：

10.1016/S0920-5632(00)00951-8

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 Mainz neutrino mass experiment is investigating the endpoint region of the tritium beta decay spectrum to determine the mass of the electron antineutrino. With its recently improved setup data were taken over more than 7 month in 1998 and 1999. For these measurements two different analyses are presented leading to m(nu)(2) = +0.6 +/- 2.8 +/- 2.1 eV(2)/c(4) and m(nu)(2) = -1.6 +/- 2.5 +/- 2.1 eV(2)/c(4), from which upper limits of m(nu) < 2.8 eV/c(2) (95 % C.L.) and m(<nu>) < 2.2 eV/c(2) (95 % C.L.) are derived. Only in one of six data sets was a clear indication for the anomaly, reported by the Troitsk group, found, and its postulated half year period is contradicted by our data. To push the sensitivity on the neutrino mass below 1 eV/c(2) a new larger MAC-E spectrometer is proposed. Besides its integrating mode it could operate in a new non-integrating MAC-E-TOF mode.

引用

页码：273 / 279

页数：7

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