Abstract
The three-vertex loop amplitude in a strong magnetic field are analyzed in a general form by using the asymptotic behavior of the electron propagator in an external field. The process \(\gamma \gamma \to \nu \bar \nu\) is studied in terms of the scalar-vector-vector (SVV), pseudoscalar-vector-vector (PVV), vector-vector-vector (VVV), and axial-vector-vector-vector (AVV) combinations of couplings. It is shown that only in the case of the SVV combination does the amplitude grow linearly with increasing magnetic-field strength, the amplitudes evaluated with the other combinations of couplings (PVV, VVV, and AVV) featuring no linearly increasing terms. The process \(\gamma \gamma \to \nu \bar \nu\) is also studied within the left-right model, which is an extension of the Standard Model of electroweak interactions and which may involve an effective scalar ννee coupling. Possible astrophysical manifestations of this process are discussed.
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Translated from Yadernaya Fizika, Vol. 66, No. 2, 2003, pp. 319–326.
Original Russian Text Copyright © 2003 by Kuznetsov, Mikheev, Rumyantsev.
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Kuznetsov, A.V., Mikheev, N.V. & Rumyantsev, D.A. Process \(\gamma \gamma \to \nu \bar \nu\) in a strong magnetic field. Phys. Atom. Nuclei 66, 294–301 (2003). https://doi.org/10.1134/1.1553501
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DOI: https://doi.org/10.1134/1.1553501