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Published March 25, 2013 | Version Published + Submitted
Journal Article Open

Precision measurement of the neutron β-decay asymmetry

Creators

Abstract

A new measurement of the neutron β-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 λ ≡ g_A/g_V = −1.2756(30).

Additional Information

© 2013 American Physical Society. Received 13 December 2012; revised manuscript received 19 February 2013; published 25 March 2013. This work was supported in part by the US Department of Energy, Office of Nuclear Physics (DE-FG02-08ER41557), National Science Foundation (NSF-0855538, NSF-1205977, NSF-0653222), and the Los Alamos National Laboratory LDRD program. We gratefully acknowledge the support of LANSCE and AOT divisions of Los Alamos National Laboratory.

Attached Files

Published - PhysRevC.87.032501.pdf

Submitted - 1210.7048v3.pdf

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1210.7048v3.pdf

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Additional details

Identifiers

Eprint ID
38138
Resolver ID
CaltechAUTHORS:20130426-140917837

Related works

Describes
http://arxiv.org/abs/1210.7048 (URL)

Funding

Department of Energy (DOE) Office of Nuclear Physics
DE-FG02-08ER41557
NSF
NSF-0855538
NSF
NSF-1205977
NSF
NSF-0653222
Los Alamos National Laboratory LDRD Program
Los Alamos National Laboratory LANSCE Division
Los Alamos National Laboratory AOT Division

Dates

Created
2013-04-26
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field

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Kellogg Radiation Laboratory