Determination of the axial-vector weak coupling constant with ultracold neutrons. Academic Article uri icon


  • A precise measurement of the neutron decay asymmetry A 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 = -0.119660.00089{-0.00140}{+0.00123}, from which we determine the ratio of the axial-vector to vector weak coupling of the nucleon g{A}/g{V}=-1.27590{-0.00445}{+0.00409}.

published proceedings

  • Phys Rev Lett

altmetric score

  • 3

author list (cited authors)

  • Liu, J., Mendenhall, M. P., Holley, A. T., Back, H. O., Bowles, T. J., Broussard, L. J., ... UCNA Collaboration.

citation count

  • 51

complete list of authors

  • Liu, J||Mendenhall, MP||Holley, AT||Back, HO||Bowles, TJ||Broussard, LJ||Carr, R||Clayton, S||Currie, S||Filippone, BW||García, A||Geltenbort, P||Hickerson, KP||Hoagland, J||Hogan, GE||Hona, B||Ito, TM||Liu, C-Y||Makela, M||Mammei, RR||Martin, JW||Melconian, D||Morris, CL||Pattie, RW||Pérez Galván, A||Pitt, ML||Plaster, B||Ramsey, JC||Rios, R||Russell, R||Saunders, A||Seestrom, SJ||Sondheim, WE||Tatar, E||Vogelaar, RB||VornDick, B||Wrede, C||Yan, H||Young, AR

publication date

  • October 2010