Microscopic derivation of pion-nucleon and pion-Delta scattering lengths

Physics – Nuclear Physics – Nuclear Theory

Scientific paper

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Clarified version of the preprint. 1 elsart manuscript, 2 eps figures

Scientific paper

10.1016/j.nuclphysa.2004.01.128

A general expression for the $\pi -N$ and $\pi-\Delta $ scattering lengths is
derived in the framework of a microscopic calculation. Annihilation, negative
energy wave-functions and spontaneous chiral symmetry are included
consistently. The point-like limit is used to calculate the scattering lengths.

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