A nonlinear gauge-invariant field theory of elementary particles
P. H. Sharman, F. I. Cooperstock · Canadian Journal of Physics · 1990
The field theory of Cooperstock and Rosen (Int. J. Theor. Phys. 28, 423 (1989)), which modelled leptons, is enlarged to encompass the two known quark families. The singularity-free field theory constructs the particles in solitonlike structures via the nonlinear interaction of three scalar fields and the electromagnetic field. The theory predicts particle sizes that are consistent with experiment.