High energy photon-neutrino interactions

Details High energy photon-neutrino interactions High energy photon-neutrino interactions

1998-08-03

arxiv.org/abs/hep-ph/9808211v1

Phys.Rev. D59 (1999) 013012

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages LaTeX, 4 postscript figures included

Scientific paper

10.1103/PhysRevD.59.013012

A general decomposition of the amplitudes for the $2\to 2$ processes $\gamma\nu\to\gamma\nu$ and $\gamma\gamma\to\nu\bar{\nu}$ is obtained using gauge invariance and Bose symmetry. The restrictions implied by this decomposition are investigated for the reaction $\gamma\gamma\to\nu\bar{\nu}$ by computing the one-loop helicity amplitudes in the standard model. In the center of mass, where $\sqrt{s} = 2\omega$, the cross section grows roughly as $\omega^6$ up to the threshold for $W$-boson production, $\sqrt{s} = 2m_W$. Astrophysical implications of very high energy photon-neutrino interactions are discussed.

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