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arXiv · hep-ph/9809418

Five-leg photon-neutrino interactions

A. Abada·J. Matias·R. Pittau
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Abstract

In a first part, we justify the feasibility of substituting a photon leg by a neutrino current in the Euler-Heisenberg Lagrangian to obtain an effective Lagrangian for the process $γν\toγγν$ and its crossed reactions. We establish the link between these processes and the four-photon scattering in both the Standard Model and the effective theory. As an application, we compute in this effective theory the processes $γν\toγγν$ and $γγ\toγν\barν$ and show how to use the $γγ\toγγ$ results as a check. We settle the question of the disagreement between two computations in the literature concerning the reaction $γγ\to γν\barν$. In the second part, we present results of the direct computation of the photon-neutrino five-leg processes in the Standard Model, discuss possible astrophysical implications of our results, and provide simple fits to the exact expressions.

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A. Abada, J. Matias, R. Pittau. 1998-09-16. Five-leg photon-neutrino interactions. https://arxiv.org/abs/hep-ph/9809418

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