Photon decay in a CPT-violating extension of quantum electrodynamics
C. Adam, F.R. Klinkhamer
TL;DR
This paper investigates photon decay within a CPT-violating extension of quantum electrodynamics, demonstrating that certain photon states can decay into three photons due to added Chern-Simons-like terms.
Contribution
It introduces a simplified model of QED with CPT violation and calculates the non-zero probability of photon decay into three photons.
Findings
Photon decay probability is non-zero in the model.
CPT-violating terms enable new decay channels.
Decay process depends on the Chern-Simons-like term.
Abstract
We consider the process of photon decay in quantum electrodynamics with a CPT-violating Chern-Simons-like term added to the action. For a simplified model with only the quadratic Maxwell and Chern-Simons-like terms and the quartic Euler-Heisenberg term, we obtain a nonvanishing probability for the decay of a particular photon state into three others.
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