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VOLUME 33 (1981) | ISSUE 7 | PAGE 380
Analytic continuation of the integral equations of the theory of scattering by an unphysical energy sheet
A simple rule is given for the Lippman-Schwinger equation for the analytic continuation of the integral equations with a Cauchy kernel on an unphysical energy sheet Ε [ImVE <0), The result obtained in this paper makes it possible to determine the virtual and resonance poles of the 5 matrix, and also the vertex decay (fusion) functions of the corresponding states by using the standard methods of calculating the bound states.