Derivative Expansion for the One-Loop Effective Lagrangian in QED

Details Derivative Expansion for the One-Loop Effective Lagrangian in QED Derivative Expansion for the One-Loop Effective Lagrangian in QED

1995-09-25

arxiv.org/abs/hep-ph/9509383v1

Can.J.Phys. 74 (1996) 282-289

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages LaTeX file, no figures

Scientific paper

The derivative expansion of the one-loop effective Lagrangian in QED$_4$ is considered. The first term in such an expansion is the famous Schwinger result for a constant electromagnetic field. In this paper we give an explicit expression for the next term containing two derivatives of the field strength $F_{\mu\nu}$. The results are presented for both fermion and scalar electrodynamics. Some possible applications of an inhomogeneous external field are pointed out.

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