Photon splitting γ → νν̃ in an external magnetic field
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چکیده
منابع مشابه
Photon splitting above the pair creation threshold in a strong magnetic field
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 ar...
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The photon-neutrino process γγ → ν ¯ ν and photon splitting are considered in a strong magnetic field. The partial polarization amplitudes are calculated within the standard model in the limit of a strong field. The amplitudes do not depend on the field strength in this limit. Using the vector parts of the amplitudes, the process of the photon splitting γ → γγ is investigated both below and abo...
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We discuss ν−γ interactions in the presence of a homogeneous magnetic field with energies less than pair production threshold. The neutrinos are taken to be massless with only standardmodel couplings. The magnetic field fulfills the dual purpose of inducing an effective neutrinophoton vertexes and of modifying the photon dispersion relation. Our conclusion is ν − γ interactions are too weak to ...
متن کاملPhoton splitting in strong magnetic fields : asymptotic approximation formulae vs . accurate numerical results
We present the results of a numerical calculation of the photon splitting rate below the electron-pair creation threshold (ω ≤ 2m) in magnetic fields B > ∼ B cr = m 2 /e = 4.414 × 10 9 T. Our results confirm asymptotic approximations derived in the low-field (B < B cr) and high-field (B ≫ B cr) limit, and allow interpolating between the two asymptotic regions. Our expression for the photon spli...
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I point out that the results stated in the recent articles on photon splitting by Wunner, Sang, and Berg and by Wentzel, Berg, & Wunner directly contradict an earlier analytic and numerical calculation that I performed of the same process using Schwinger’s proper time method, for strong magnetic fields and general energies below the pair production threshold. The results of Wunner et al. and We...
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تاریخ انتشار 1997