Photon splitting above the pair creation threshold in a strong magnetic field

Details Photon splitting above the pair creation threshold in a strong magnetic field Photon splitting above the pair creation threshold in a strong magnetic field

1998-04-29

arxiv.org/abs/hep-ph/9804444v2

Phys.Lett. B434 (1998) 67-73

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 figures, LaTeX, uses epsf.sty, numerical error in eq.(11) corrected, typos fixed, presentation improved, accepted

Scientific paper

10.1016/S0370-2693(98)00757-6

The process of photon splitting $\gamma \to \gamma \gamma$ in a strong magnetic field is investigated both below and above the pair creation threshold. Contrary to the statement by Baier et al., the ``allowed'' channel $\alw$ is shown not to be a comprehensive description of splitting in the strong field because the ``forbidden'' channel $\frb$ is also essential. The partial amplitudes and the splitting probabilities are calculated taking account of the photon dispersion and large radiative corrections near the resonance.

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