Does the Multiple-scattering Series in the Pion-deuteron Scattering Actually Converge?

preprint2013arXivOpen access

Abstract

It is demonstrated that the well-known answer for the multiple-scattering series (MSS) for a light particle interacting to a pair of static nucleons, calculated in the Fixed Centers Approximation (FCA), works well for a wide region of the two-body complex scattering length aa. However, this approach is not applicable in a narrow region surrounding the real positive aa half-axis, where the MSS does not converge. Simultaneously, for real positive aa's the 3-body system forms an infinite set of bound states.

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