Finite field-energy of a point charge in QED

@article{Costa2013FiniteFO,
  title={Finite field-energy of a point charge in QED},
  author={Caio V. Costa and D. M. Gitman and Anatoly E. Shabad},
  journal={Physica Scripta},
  year={2013},
  volume={90}
}
We consider a simple nonlinear (quartic in the fields) gauge-invariant modification of classical electrodynamics, to show that it possesses a regularizing ability sufficient to make the field energy of a point charge finite. The model is exactly solved in the class of static central-symmetric electric fields. Collation with quantum electrodynamics (QED) results in the total field energy of a point elementary charge about twice the electron mass. The proof of the finiteness of the field energy… 

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