Precision measurement of the neutron beta-decay asymmetry

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TR Number
Date
2013-03-25
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract

A new measurement of the neutron beta-decay asymmetry A(0) has been carried out by the UCNA Collaboration using polarized ultracold neutrons (UCNs) from the solid deuterium UCN source at the Los Alamos Neutron Science Center. Improvements in the experiment have led to reductions in both statistical and systematic uncertainties leading to A(0) = -0.11954(55)(stat)(98)(syst), corresponding to the ratio of axial-vector to vector coupling lambda = g(A)/g(V) = -1.2756(30).

Description
Keywords
multiwire proportional chamber, polarized neutrons, low-energy, spectrometer, Simulation, tests, Physics
Citation
Mendenhall, M. P. ; Pattie, R. W., Jr. ; Bagdasarova, Y. ; et al., Mar 25, 2013. “Precision measurement of the neutron beta-decay asymmetry,” PHYSICAL REVIEW C 87(3): 032501. DOI: 10.1103/PhysRevC.87.032501