Precision measurement of the neutron β-decay asymmetry

M. P. Mendenhall, R. W. Pattie, Y. Bagdasarova, D. B. Berguno, L. J. Broussard, R. Carr, S. Currie, X. Ding, B. W. Filippone, A. García, P. Geltenbort, K. P. Hickerson, J. Hoagland, A. T. Holley, R. Hong, T. M. Ito, A. Knecht, C. Y. Liu, J. L. Liu, M. MakelaR. R. Mammei, J. W. Martin, D. Melconian, S. D. Moore, C. L. Morris, A. Pérez Galván, R. Picker, M. L. Pitt, B. Plaster, J. C. Ramsey, R. Rios, A. Saunders, S. J. Seestrom, E. I. Sharapov, W. E. Sondheim, E. Tatar, R. B. Vogelaar, B. Vorndick, C. Wrede, A. R. Young, B. A. Zeck

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84 Scopus citations

Abstract

A new measurement of the neutron β-decay asymmetry A0 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 A0=-0.11954( 55)stat(98)syst, corresponding to the ratio of axial-vector to vector coupling λ≡gA/g V=-1.2756(30).

Original languageEnglish
Article number032501
JournalPhysical Review C - Nuclear Physics
Volume87
Issue number3
DOIs
StatePublished - Mar 25 2013

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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