Photon splitting above the pair creation threshold in a strong magnetic field
نویسندگان
چکیده
A process of the photon splitting γ → γγ in a strong magnetic field is investigated below and above the pair creation threshold. Contrary to the statement by Baier e.a., the " allowed " channel γ → γ ⊥ γ ⊥ is shown not to be comprehensive for the splitting in the strong field because the " forbidden " channel γ → γ γ ⊥ is also essential. The partial amplitudes and the splitting probabilities are calculated with taking account of the photon dispersion and large radiative corrections near the resonance. Submitted to Physics Letters B Nowadays it is generally recognized that the external electromagnetic field plays a role of the active medium. It can induce new interactions and can 1
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