SUB-EV LIMIT FOR THE NEUTRINO MASS FROM GE-76 DOUBLE-BETA DECAY BY THE HEIDELBERG-MOSCOW EXPERIMENT

被引：56

作者：

BALYSH, A

BECK, M

BELYAEV, ST

BOCKHOLT, J

DEMEHIN, A

GUROV, A

HELLMIG, J

HEUSSER, G

HIRSCH, M

HOFFMANN, C

KLAPDORKLEINGROTHAUS, HV

KONDRATENKO, I

KOTELNIKOV, D

LEBEDEV, VI

MAIER, B

MULLER, A

PAS, H

PETRY, F

SCHEER, E

STRECKER, H

VOLLINGER, M

机构：

[1] KURCHATOV INST, MOSCOW 123182, RUSSIA

[2] IST NAZL FIS NUCL, I-67010 ASSERGI, ITALY

来源：

PHYSICS LETTERS B | 1995年 / 356卷 / 04期

关键词：

D O I：

10.1016/0370-2693(95)00817-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The HEIDELBERG-MOSCOW double beta decay experiment using HP germanium semiconductor detectors enriched in Ge-76 is the first beta beta experiment to penetrate into the sub-eV range. After a measuring time of 10.2 kg . a (117.0 mol . a) the half-life limit for Ge-76 0 nu beta beta decay is T-1/2 greater than or equal to 5.6X10(24) a (90% C. L.) or T-1/2 greater than or equal to 9.4 X10(24) a (68% C.L.) which corresponds to an upper Limit for the effective Majorana neutrino mass [m(nu)] less than or equal to 0.65 eV (90% C.L.) or [m(nu)] less than or equal to 0.50 eV (68% C. L.). For a superheavy neutrino, as it occurs, e. g., in seesaw models, we extract a limit of [m(H)] greater than or equal to 5.1x10(7) GeV. These numbers are of importance in the context of presently discussed indications of physics beyond the Standard Model.

引用

页码：450 / 455

页数：6

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