Has neutrinoless double β decay of 76Ge been really observed?

被引：73

作者：

Zdesenko, YG ^{[1
]}

Danevich, FA ^{[1
]}

Tretyak, VI ^{[1
]}

机构：

[1] Nucl Res Inst, MSP, UA-03680 Kiev, Ukraine

来源：

PHYSICS LETTERS B | 2002年 / 546卷 / 3-4期

关键词：

Ge-76; neutrinoless 2 beta decay; T-1/2; limit; neutrino mass constraint;

D O I：

10.1016/S0370-2693(02)02705-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The claim of discovery of the neutrinoless, double beta (0nu2beta) decay of Ge-76 [Mod. Phys. Lett. A 16 (2001) 2409] is considered critically and firm conclusion about, at least, prematurity of such a claim is derived on the basis of a simple statistical analysis of the measured spectra. This result is also proved by analyzing the cumulative data sets of the Heidelberg-Moscow and IGEX experiments. Besides, it allows us to establish the highest worldwide half-life limit on the 0nu2beta decay of Ge-76: T-1/2(0nu) greater than or equal to 2.5 (4.2) x 10(25) yr at 90% (68%) C.L. This bound corresponds to the most stringent constraint on the Majorana neutrino mass: m(nu) less than or equal to .0.3 (0.2) eV at 90% (68%) C.L. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：206 / 215

页数：10

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