标题： π介子产生模型——动力学与夸克模型之间的联系 显示英文标题

标题： Pion Production Model - Connection between Dynamics and Quark Models

摘要： 我们讨论了利用从π-N和γ-N反应数据的经验幅值分析提取的N*参数来检验强子模型的困难。作为替代方案或可能更优越的方法，我们提出了一种哈密顿量表述，可以将π介子产生动力学与N*结构的组分夸克模型联系起来。回顾了这种方法在研究Δ和N*（S_{11}）激发中的应用。结果发现，虽然Δ激发可以被令人满意地描述，但S_{11}通道的π-N散射不能通过基于单胶子交换或单玻色子交换机制的组分夸克模型来描述。为了重现S_{11}振幅，构造了一个唯象夸克-夸克势。 显示英文摘要

摘要： We discuss the difficulties in testing the hadron models by using the N^* parameters extracted from the empirical amplitude analyses of the pi-N and gamma-N reaction data. As an alternative or perhaps a more advantageous approach, we present a Hamiltonian formulation that can relate the pion production dynamics and the constituent quark models of N^* structure. The application of the approach in investigating the Delta and N^*(S_{11}) excitations is reviewed. It is found that while the Delta excitation can be described satisfactory, the pi-N scattering in S_{11} channel can not be described by the constituent quark models based on either the one-gluon-exchange or one-meson-exchange mechanisms. A phenomenological quark-quark potential has been constructed to reproduce the S_{11} amplitude.