CaltechAUTHORS
Published October 29, 2010 | Version Published
Journal Article Open

Determination of the Axial-Vector Weak Coupling Constant with Ultracold Neutrons

Creators

Abstract

A precise measurement of the neutron decay β asymmetry A_0 has been carried out using polarized ultracold neutrons from the pulsed spallation ultracold neutron source at the Los Alamos Neutron Science Center. Combining data obtained in 2008 and 2009, we report A_0 = -0.119 66 ± 0.00089_(-0.001 40)^(+0.001 23), from which we determine the ratio of the axial-vector to vector weak coupling of the nucleon g_(A)/g_(V) = -1.275 90_(-0.004 45)^(+0.004 09).

Additional Information

© 2010 American Physical Society. Received 21 July 2010; published 29 October 2010; corrected 9 November 2010. This work was supported in part by the Department of Energy Office of Nuclear Physics, National Science Foundation (NSF-0555674, NSF-0855538, NSF-0653222), and the Los Alamos National Laboratory LDRD program. We gratefully acknowledge the support of the LANSCE and AOT divisions of Los Alamos National Lab.

Attached Files

Published - Liu2010p11982Phys_Rev_Lett.pdf

Files

Liu2010p11982Phys_Rev_Lett.pdf

Files (331.4 kB)

Name Size
md5:1271c30781cee8456edd7a4572e71e92
331.4 kB Preview Download

Additional details

Identifiers

Eprint ID
21296
Resolver ID
CaltechAUTHORS:20101210-113241656

Funding

Department of Energy Office of Nuclear Physics
NSF
NSF-0555674
NSF
NSF-0855538
NSF
NSF- 0653222
Los Alamos National Laboratory LDRD (Laboratory Directed Research and Development) program
LANSCE (Los Alamos Neutron Science Center) division of Los Alamos National Laboratory
AOT (Accelerator and Operations Technology) division of Los Alamos National Laboratory

Dates

Created
2010-12-11
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field