Geodesic
Functional integral for the scattering amplitude in the presence of a long-range interaction
Teoretičeskaâ i matematičeskaâ fizika, Tome 41 (1979) no. 1, pp. 12-25 Cet article a éte moissonné depuis la source Math-Net.Ru

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A generalization is obtained of the functional integral for the scattering amplitude (and also for the stationary wave function of the scattering problem) in the case of “moderate” long-range interactions, i.e., in the case of potentials $\mathfrak{b}(r)$ having the behavior $zr^{-\lambda}$, $1/2<\lambda\leqslant1$, for large $r$. The quasiclassieal expansion of the scattering amplitude is considered. 
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A. N. Vasil'ev; A. V. Kuzmenko. Functional integral for the scattering amplitude in the presence of a long-range interaction. Teoretičeskaâ i matematičeskaâ fizika, Tome 41 (1979) no. 1, pp. 12-25. http://geodesic.mathdoc.fr/item/TMF_1979_41_1_a2/

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