Finite field-energy of a point charge in QED

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Author(s):	Costa, Caio V. ; Gitman, Dmitry M. ; Shabad, Anatoly E. Total Authors: 3
Document type:	Journal article
Source:	PHYSICA SCRIPTA; v. 90, n. 7, p. 6-pg., 2015-07-01.
Abstract
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 is extended to include any polynomial selfinteraction, thereby the one that stems from the truncated expansion of the Euler-Heisenberg local Lagrangian in QED in powers of the field strength. (AU)

FAPESP's process:	14/08970-1 - Nonlinear effects in basic problems of quantum electrodynamics
Grantee:	Dmitri Maximovitch Guitman
Support Opportunities:	Research Grants - Visiting Researcher Grant - International