The stability of a chiral soliton in the fermion one-loop approximation

Abstract

The energy of Dirac sea quarks coupled to a SU(2) chiral field, commonly referred to as the Casimir energy, is calculated for a hedgehog shape. The soliton is shown to remain stable with respect to collapse when this energy is included. Derivative expansions are found to be inadequate for discussing stability. © 1985.