Abstract
In an attempt to overcome certain difficulties of summing higher order processes in pion multiple scattering theories, we derive a new, systematic expansion for the interaction of a pion in nuclear matter within the context of the Foldy-Walecka theory, incorporating nucleon-nucleon correlations and an idea of self-consistency. We evaluate the first two orders in the expansion as a function of the nonlocality range; the expansion appears to be rapidly converging, in contrast to expansion schemes previously examined.
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