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

Pedro Bicudo·Manuel Faria·Gonçalo Marques·J. Emilio Ribeiro
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Abstract

A general expression for the $π-N$ and $π-Δ$ 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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Pedro Bicudo, Manuel Faria, Gonçalo Marques, J. Emilio Ribeiro. 2003-07-03. Microscopic derivation of pion-nucleon and pion-Delta scattering lengths. https://doi.org/10.1016/j.nuclphysa.2004.01.128

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