Exact analytic solutions to the nonlinear Dirac equation display ring singularities for NJL nonlinearity and shell singularities for Soler nonlinearity, each of Compton length scale.
A soluble relativistic field theory
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Analytic exact solutions to the nonlinear Dirac equation
Exact analytic solutions to the nonlinear Dirac equation display ring singularities for NJL nonlinearity and shell singularities for Soler nonlinearity, each of Compton length scale.