gamma nu -> gamma gamma nu and crossed processes at energies below m_W

Details gamma nu -> gamma gamma nu and crossed processes at energies below m_W gamma nu -> gamma gamma nu and crossed processes at energies below m_W

1998-06-26

arxiv.org/abs/hep-ph/9806499v1

Phys.Rev. D59 (1999) 013005

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, RevTex, 10 postscript figures included

Scientific paper

10.1103/PhysRevD.59.013005

The cross sections for the processes $\gamma \nu\to \gamma \gamma \nu$, $\gamma\gamma\to\gamma\nu\bar{\nu}$ and $\nu\bar{\nu}\to\gamma\gamma\gamma$ are calculated for a range of center of mass energies from below $m_e$ to considerably above $m_e$, but much less than $m_W$. This enables us to treat the neutrino--electron coupling as a four--Fermi interaction and results in amplitudes which are electron box diagrams with three real photons and one virtual photon at their vertices. These calculations extend our previous low--energy effective interaction results to higher energies and enable us to determine where the effective theory is reliable.

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