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Vacuum photon splitting in Lorentz-violating quantum electrodynamics.

V Alan Kostelecký1, Austin G M Pickering

  • 1Physics Department, Indiana University, Bloomington, Indiana 47405, USA.

Physical Review Letters
|August 9, 2003
PubMed
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Lorentz violation in quantum electrodynamics allows vacuum photon splitting, a process forbidden in standard theories. This study quantifies these novel radiative corrections and their CPT-odd contributions.

Area of Science:

  • Theoretical Physics
  • Quantum Electrodynamics
  • Particle Physics

Background:

  • Conventional electrodynamics assumes Lorentz and CPT symmetry.
  • Lorentz violation in the fermion sector is a theoretical possibility.
  • Vacuum photon splitting is a predicted phenomenon under specific symmetry violations.

Purpose of the Study:

  • To investigate radiative corrections from Lorentz violation.
  • To determine the amplitude of vacuum photon splitting.
  • To analyze CPT-even and CPT-odd contributions to this process.

Main Methods:

  • One-loop calculations in quantum field theory.
  • Analysis of on-shell amplitudes.
  • Perturbative expansion of radiative corrections.

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Main Results:

  • A nonzero amplitude for vacuum photon splitting was derived.
  • Both CPT-even and CPT-odd contributions were identified.
  • These contributions are forbidden in standard electrodynamics.

Conclusions:

  • Lorentz violation in the fermion sector enables new physical phenomena.
  • Vacuum photon splitting serves as a potential signature for Lorentz and CPT violation.
  • Further research can explore experimental implications of these findings.