Axial Currents in Nuclei: The Gamow-Teller Matrix Element

We propose that the quenching of Gamow-Teller matrix elements in light nuclei can be effectively described by a mechanism that governs the p-wave pion-nucleus scattering. This may be providing a solution to the long-standing problem. The resulting Landau-Migdal parameter g' turns out to be quite consistent with the values extracted from the spectra of pionlike excitations and places a stringent constraint on pion condensation in nuclear matter.