Vacuum Photon Splitting in Lorentz-Violating Quantum Electrodynamics
arXiv:hep-ph/0212382 · doi:10.1103/PhysRevLett.91.031801
Abstract
Radiative corrections arising from Lorentz violation in the fermion sector induce a nonzero amplitude for vacuum photon splitting. At one loop, the on-shell amplitude acquires both CPT-even and CPT-odd contributions forbidden in conventional electrodynamics.
4 pages, minor wording changes, references added, accepted in Physical Review Letters