Paper
Modified Euler-Heisenberg effective action and Proper-Time Method in Lorentz-Violating Scalar QED
Authors
L. C. T. Brito, J. C. C. Felipe, A. C. Lehum, J. R. Nascimento, A. Yu. Petrov
Abstract
Quantum photon effects in vacuum provide an interesting setting to test quantum electrodynamics, serving as a source for predictions about physics beyond the Standard Model. In this paper, we investigate these effects by calculating the one-loop Euler-Heisenberg-like effective action within a Lorentz-violating scalar quantum electrodynamics framework. In both CPT-even and CPT-odd scenarios, we obtain the exact result in all orders of the stress tensor and evaluate explicitly the lower orders of this effective action. We identify the quantum effects coming from Lorentz violation in an explicitly gauge invariant way. Nonlinear Lorentz-violating contributions that may affect photon-photon scattering are explicitly evaluated.