Nucleon Electric Form-Factors And Quark Sea Polarization In The Nambu-Jona-Lasinio Model

The nucleon electric form factors are extracted from the semiclassically quantized solitonic solution of the Nambu-Jona-Lasinio model. To this end the model is solved self-consistently in the SU(2) sector with scalar coupling using the zero-boson and one-quark loop approximation on the chiral circle. Charge distributions, squared radii and the Coulomb energy splitting are calculated as well. For constituent masses around M = 400 MeV one obtains good agreement with the experimental data of the proton. The tail of the neutron charge distribution is made of polarized sea quarks.