Corrections to the nuclear axial vector coupling in a nuclear mediumG.W. Carter and E.M. Henley
Department of Physics,Box 351560, University of Washington, Seattle, WA 98195-1560, USA
(Received 15 October 2004 / Published online 08 February 2005)
The temporal component of the weak axial vector current in nuclei is increased due to meson exchange currents. We consider further corrections from pions and the sigma mean-field.
PACS: 23.40.-s Beta decay; double beta decay; electron and muon capture - 23.40.Bw Weak interaction and lepton (including neutrino) aspects
© Società Italiana di Fisica, Springer-Verlag 2005