The classical pion field in a nucleus
Abstract
Description
A self-consistent symmetry arises when the nucleon angular momentum j and the isospin t are coupled to a grand spin G. Closed G shells become sources of a classical pion field with a hedgehog shape. Although the amplitude of the pion field, as measured by the chiral angle, is small, it is found to perturb significantly the energies of the nucleon orbits.
17 pages, 3 figures, new appendix, revised conclusions
17 pages, 3 figures, new appendix, revised conclusions