Impossibility of obtaining a CP-violating Euler-Heisenberg effective theory from a viable modification of QED
arXiv:2204.02126 · doi:10.1140/epjc/s10052-022-10351-8
Abstract
In this paper, we examine the CP-violating term of the Euler-Heisenberg action. We focus in the aspects related with the generation of such a term from a QED-like model in terms of the effective action approach. In particular, we show that the generation of the CP-violating term is closely related with both of vector and axial fermionic bilinears. Although, these anomalous models are not a "viable" extension of QED, we argue that the CP-violating term in the photon sector is obtained only from this class of models, and not from any fundamental field theory.
arXiv comment6 pages, published version
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