A measurement of the beta asymmetry A in the decay of free neutrons

被引：75

作者：

Abele, H ^{[1
]}

Baessler, S ^{[1
]}

Dubbers, D ^{[1
]}

Last, J ^{[1
]}

Mayerhofer, U ^{[1
]}

Metz, C ^{[1
]}

Muller, TM ^{[1
]}

Nesvizhevsky, V ^{[1
]}

Raven, C ^{[1
]}

Scharpf, O ^{[1
]}

Zimmer, O ^{[1
]}

机构：

[1] INST MAX VON LAUE PAUL LANGEVIN,F-38000 GRENOBLE,FRANCE

来源：

PHYSICS LETTERS B | 1997年 / 407卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(97)00739-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have measured the beta asymmetry A in the decay of free polarized neutrons, using the 4 pi superconducting spectrometer PERKEO II. The asymmetry parameter is A(0) = -0.1189(12) corresponding to g(A)/g(V) = -1.274(3). This value differs by three standard deviations from the one given by the Particle Data Group 1996. Our result contradicts earlier speculation on the existence of right-handed currents in neutron decay. (C) 1997 Elsevier Science B.V.

引用

页码：212 / 218

页数：7

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