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arXiv · hep-ph/9709290

Neutrino-photon reactions in astrophysics and cosmology

D. Seckel
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Abstract

At energies above the threshold for $W$ production the process $νγ\to l W^+$ is competive with $νν$ scattering at the same center of mass energies. In a cosmological setting, absorption of ultra high energy neutrinos by the microwave photon background is comparable to absorption by the neutrino background. In passing through matter, the process $ν\to l W^+$ will occur in the coulomb field of nuclei. For iron, the interaction rate per nucleon is roughly 20% of the charge current cross-section. The related process, $\antiν_e e^- \to γW^-$ dominates $\antiν_e e^-$ scattering for about a decade in energy above the resonance for $W$ production.

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D. Seckel. 1997-09-09. Neutrino-photon reactions in astrophysics and cosmology. https://doi.org/10.1103/physrevlett.80.900

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