K-NSchannelI=1,0 phase shifts as a direct measure of chiral condensation

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Abstract
We study, in the framework of a QCD-inspired confining Nambu–Jona-Lasinio model, the I=1;0, S-wave K-N phase shifts for simple examples of chirally consistent microscopic potentials. The Dyson equation for the scattering of the bound states K and N is solved. The equivalence between this equation and the resonating group method equation is presented. The role of the chiral symmetry in the strength of the effective hyperfine potential, simultaneously responsible for the features of K-N repulsion and the π-ρ mass difference, is discussed.

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