手征Su(3)夸克模型研究低能Nπ散射相移(英文)  

Chiral SU(3) Quark Model Study of Low Energy NπScattering Phase Shifts

作　　者：黄飞[1] 张宗烨[1] 余友文[1] 

机构地区：[1]中国科学院高能物理研究所

出　　处：《高能物理与核物理》2005年第10期948-953,共6页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10475087)资助~~

摘　　要：在手征SU(3)夸克模型中,通过求解共振群方程动力学地研究了同位旋I=1/2和I=3/2道Nπ的S波和P波低能弹性散射相移.所用的模型参数由基态八重态和十重态重子的能量定出,并能给出不同分波的KN散射相移.除了有明显共振态的道以外,计算得到的各个分波的Nπ散射相移和实验值定性一致.A dynamical study of the low energy nucleon-pion scattering phase shifts for S and P waves with isospin I = 1/2 and I = 3/2 is performed in the chiral SU（3） quark model by solving a resonating group method equation. The model parameters are taken to be the values fitted by the energies of the baryon ground states and the kaon-nucleon elastic scattering phase shifts of different partial waves. Except for the resonant channels, the numerical results are in qualitative agreement with the experimental data.

关 键 词：Nπ散射相移 夸克模型 手征对称性 手征SU(3)夸克模型 弹性散射 相移 低能 Π 模型参数 共振态 

分 类 号：O572.31[理学—粒子物理与原子核物理]