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VOLUME 81 | ISSUE 6 | PAGE 313 Photon-neutrino interactions G. Karl, V. Novikov Department of Physics, University of Guelph, Ontario, Canada, N1G 2W1 Guelph-Waterloo Physics Institute, Department of Physics, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1 PACS: 13.15.+g Abstract We discuss the interaction of photons with neutrinos including two lepton loops. The parity violation in the γ ν → γ ν channel due to two lepton loops is substantially enhanced relative to the one lepton loop contribution. However there is no corresponding enhancement in the parity conserving amplitude in either the direct or the cross channel . Download PS file (GZipped, 133.2K)  |  Download PDF file (192.7K)