Nuclear axial currents from scale-chiral effective field theory

By incorporating hidden scale symmetry and hidden local symmetry in the nuclear effective field theory, combined with the double soft-pion theorem, we predict that the Gamow-Teller operator coming from the space component of the axial current should remain unaffected by the QCD vacuum change caused by the baryonic density, whereas the first forbidden beta transition operator coming from the time component should be strongly enhanced. While the latter has been con firmed for some time, the former was given support by a powerful recent ab initio quantum Monte Carlo calculation for light nuclei, which also con firmed the old chiral filter hypothesis. "Formulated in terms of the Fermi-liquid fixed point structure of strong-coupled nuclear interactions, we off er an extremely simple resolution to the long-standing puzzle of the quenched g(A)," g(A)(eff)approximate to 1 [1], found in nuclear Gamow-Teller beta transitions, giant Gamow-Teller resonances, and double beta decays.