Comment on "Vacuum Photon Splitting in Lorentz-Violating Quantum Electrodynamics"

Details Comment on "Vacuum Photon Splitting in Lorentz-Violating Quantum Electrodynamics" Comment on "Vacuum Photon Splitting in Lorentz-Violating Quantum Electrodynamics"

2003-12-11

arxiv.org/abs/hep-ph/0312153v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages revtex4

Scientific paper

It has been argued in hep-ph/0212382 that there may be observable effects from photon triple splitting in an extended version of quantum electrodynamics with Lorentz violation in the fermion sector. The argument is based on an analogy with photon splitting via collinear parametric down-conversion in optically active crystals. In this Comment, we point out that the analogy is misleading and that, at the order considered, the probability of on-shell photon triple splitting is strictly zero.

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