Quantum solitons of the nonlinear sigma-model with broken chiral symmetry

Abstract

It is proved that the quantum-mechanical consideration of global breathing of a hedgehog-like field configuration leads to the dynamically stable soliton solutions in the nonlinear sigma-model without the Skyrme term. Such solutions exist only when chiral symmetry of the model is broken.

Comments: 13 pages, LaTeX, ITP-93-44E