Is Lavelle-McMullan transformation a really new symmetry in QED?

Abstract

Lavelle-McMullan symmetry of QED is examined at classical and quantum levels. It is shown that Lavelle-McMullan symmetry does not give any new non-trivial information in QED by examining the Ward-Takahashi identities. Being inspired by the examination of Ward-Takahashi identity, we construct the generalized non-local and non-covariant symmetries of QED.

arXiv commentLATEX, 9 pages, two figures generated by Feynman