Search for Stimulated Photon-Photon Scattering in Vacuum
arXiv:1007.0104 · doi:10.1007/s100530050535
Abstract
We have searched for stimulated photon scattering in vacuum at a center of mass photon energy of 0.8 eV. The QED contribution to this process is equivalent to four wave mixing in vacuum. No evidence for gamma-gamma scattering was observed. The corresponding upper limit of the cross section is sigma_Lim=1.5 10^{-48}cm2.
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