Beta-Decay Asymmetry of the Neutron and $\frac{g_{A}}{g_{V}}$

Publisher Website

3 March 1986

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 56 (9) , 919-922
https://doi.org/10.1103/physrevlett.56.919

Abstract

The

β

-decay asymmetry of the free neutron is measured by use of a beam of polarized neutrons and a long solenoidal

β

spectrometer with

4 π

solid angle for electron detection. The asymmetry parameter corrected for recoil and weak magnetism is

A_{0} = - 0.1146 \pm 0.0019

, implying

\frac{g_{A}}{g_{V}} = - 1.262 \pm 0.005

for the ratio of the axial-vector to the vector weak-coupling constants.

Keywords

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