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

Abstract
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.

Title of program: PiN
Catalogue Id: ADHA_v1_0

Nature of problem
The subatomic interactions between mesons and baryons is believed to arise from the interaction between the quarks and gluons contained within the particles. This difficult many-body field theory problem is modeled by considering only the baryons as bound states of quarks, and by treating the mesons as elementary fields. The gluon degrees of freedom are averaged out of the theory, resulting in an effective color dielectric field which binds the quarks within the baryons. The scattering and bound ...

Versions of this program held in the CPC repository in Mendeley Data
ADHA_v1_0; PiN; 10.1016/S0010-4655(97)00122-7

This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

本文所述之Fortran程序PiN，共计9421行代码，旨在求解动量空间中散射可观测量及耦合(πN, πΔ)系统的束缚态/共振态性质的李普曼-薛定谔方程。该程序通过计算程序处理源于手征色介电夸克和云袋模型的基本相互作用，而夸克的束缚态波函数则由另一独立程序计算。

程序名称：PiN
目录编号：ADHA_v1_0

问题性质：介子与重子之间的亚原子相互作用被认为源于粒子内部夸克和胶子的相互作用。这一复杂的多体场论问题通过仅将重子视为夸克的束缚态，并将介子视为基本场来建模。胶子自由度从理论中平均去除，从而形成一种有效的色介电场，该场将夸克束缚于重子内部。散射与束缚态...