Precision measurement of the neutron β-decay asymmetry
- Mendenhall, M. P.
- Carr, R.
- Filippone, B. W.
- Hickerson, K. P.
- Liu, J. L.
- Pérez Galván, A.
- Picker, R.
Publication date
March 2013
DOI Publisher
American Physical Society (APS) ISSN
0556-2813Abstract
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)
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