The exact three-dimensional half-shell t-matrix for a sharply cut-off Coulomb potential in the screening limit

preprint2009arXivOpen access

Abstract

The three-dimensional half-shell t-matrix for a sharply cut-off Coulomb potential is analytically derived together with its asymptotic form without reference to partial wave expansion. The numerical solutions of the three-dimensional Lippmann-Schwinger equation for increasing cut-off radii provide half-shell t-matrices which are in quite a good agreement with the asymptotic values.

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