Determination of the Axial-Vector Weak Coupling Constant with Ultracold Neutrons
Abstract
A precise measurement of the neutron decay beta 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 +/- 0.000 89(-0.001 40)(+0.001 23), from which we determine
the ratio of the axial- vector to vector weak coupling of the nucleon gA/gV = -1.275
90(-0.004 45)(+0.004 09).
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https://hdl.handle.net/10161/4303Published Version (Please cite this version)
10.1103/PhysRevLett.105.181803Citation
Liu,J.;Mendenhall,M. P.;Holley,A. T.;Back,H. O.;Bowles,T. J.;Broussard,L. J.;Carr,R.;Clayton,S.;Currie,S.;Filippone,B.
W.;Garcia,A.;Geltenbort,P.;Hickerson,K. P.;Hoagland,J.;Hogan,G. E.;Hona,B.;Ito,T.
M.;Liu,C. -Y;Makela,M.;Mammei,R. R.;Martin,J. W.;Melconian,D.;Morris,C. L.;Pattie,R.
W., Jr.;Galvan,A. Perez;Pitt,M. L.;Plaster,B.;Ramsey,J. C.;Rios,R.;Russell,R.;Saunders,A.;Seestrom,S.
J.;Sondheim,W. E.;Tatar,E.;Vogelaar,R. B.;VornDick,B.;Wrede,C.;Yan,H.;Young,A. R.;UCNA
Collaboration. 2010. Determination of the Axial-Vector Weak Coupling Constant with
Ultracold Neutrons. Physical Review Letters 105(18): 181803-181803.
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