We extend an effective Lagrangian embodying broken scale and chiral symmetry to include explicit chiral symmetry breaking and an additional chiral-invariant term which allows for an axial coupling constant greater than unity. We also include a chiral Lagrangian for the isotriplet vector mesons which leads to a renormalization of the pion field. The properties of nuclear matter and nuclei, low-energy πN scattering and the behavior of quantities such as the pion mass and axial coupling at finite density are discussed.
Bibliographical noteFunding Information:
We acknowledge partial support from the Department of Energy under grants No. DE-FG02-87ER40328 and DE-FG02-94ER40823. A grant for computing time from the Minnesota Supercomputer Institute is gratefully acknowledged.