PiN: Computation of pion-nucleon scattering and bound states with the color dielectric quark model Original Research Article

Described is a 9421 line Fortran program PiN that solves momentum-space integral Lippmann-Schwinger equations for the scattering observables and the bound/resonant state properties of the coupled (πN, πΔ) system. The elementary interactions arise from the chiral color-dielectric quark and the cloudy bag models, which are computed by the code. The bound state wave functions of the quarks are computed by a separate code.