Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-09-15
Phys.Rev. D57 (1998) 4025-4034
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, Latex, 2 Figures
Scientific paper
10.1103/PhysRevD.57.4025
Using impact-factor representation, we consider the lepton pair production by an incident high-energy photon in a strong electromagnetic field of a nucleus. By summing leading terms of perturbation series, we obtain a simple formula for the amplitude, valid to all orders in ${\cal O}(\alpha Z)$ and arbitrary field of the nucleus. Using these results, we derive, in a simple manner, the results for the lepton pair production by a virtual incident photon in a Coulomb field. For real incident photon our results coincide with the known ones. Also, a particular example of a non-Coulomb potential is discussed in some detail.
Ivanov Dmitri
Melnikov Kirill
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