Liu, J. and Mendenhall, M. P. and Carr, R. and Filippone, B. W. and Hickerson, K. P. and Pérez Galván, A. and Russell, R. (2010) Determination of the Axial-Vector Weak Coupling Constant with Ultracold Neutrons. Physical Review Letters, 105 (18). Art. No.181803. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:20101210-113241656
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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.|
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|Deposited By:||Jason Perez|
|Deposited On:||11 Dec 2010 00:46|
|Last Modified:||26 Dec 2012 12:44|
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