CP-Violation in Low-Energy Photon-Photon Interactions

Abstract

CP-violation in the loop-mediated photon-photon interactions would modify the birefringence of the quantum vacuum. We discuss the implications of this effect on the PVLAS-Phase II experiment, in which a time-dependent magnetic field is modulated. We show that the violation of CP would imply the existence of characteristic Fourier components, in the intensity spectrum of the outgoing wave. In order to estimate the magnitude of this effect within the Standard Model, we use chiral perturbation theory to compute the theta-term contribution to the coefficient of the leading CP-odd vertex, in the low-energy effective field theory for photon dynamics.

8 pages, 2 figures. New results added. Definitive version, published in Phys. Rev. D

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• An Improved Experimental Limit on the Electric Dipole Moment of the Neutron
• The BMV experiment : a novel apparatus to study the propagation of light in a transverse magnetic field
• Measurement of CP asymmetry in Cabibbo suppressed D0 decays
• Evidence for CP violation in B0->J/Psi pi0 decays
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Cited by in corpus (6)

• Magnetic and electric properties of quantum vacuum
• Constraining nonlinear corrections to Maxwell electrodynamics using $\gamma \gamma$ scattering
• Probing CP Violation in Photon Self-Interactions with Cavities
• Schwarzschild spacetime immersed in test nonlinear electromagnetic fields
• Impossibility of obtaining a CP-violating Euler-Heisenberg effective theory from a viable modification of QED
• Induced CP-violation in the Euler-Heisenberg Lagrangian