核子自旋结构  

Nucleon Spin Structure

作　　者：王凡[1] 

机构地区：[1]南京大学物理系,江苏南京210093

出　　处：《原子核物理评论》2000年第1期10-18,共9页Nuclear Physics Review

基　　金：国家自然科学基金!资助项目 ( 19675 0 18);国家教育部博士点基金资助 ;国家攀登计划基金资助&&

摘　　要：简要介绍了夸克的发现、核子的夸克模型 ,详细讨论了夸克模型中核子内夸克自旋结构和极化轻子 -核子深度非弹散射测量出的夸克自旋结构中的矛盾 .指出这个矛盾是由于对夸克自旋理解的混淆 .最后还讨论了规范不变性和正则量子化两大物理学原则在夸克、电子轨道角动量上出现的矛盾 .A simple introduction of the discovery of quark and the constituent quark model of nucleon have been given. The contradiction between the quark spin structure of nucleon of the constituent quark model and the measured one in the polarized deep inelastic lepton nucleon scattering has been explained in detail. It is elucidated that the so called “proton spin crisis” is due to quark spin confusion. The incompatibility between the requirement of gauge invariance and canonical quantization for the orbital angular momentum operator of a quark in a nucleon or an electron in an atom has been discussed.

关 键 词：夸克 核子自旋 极化深度非弹散射 结构 

分 类 号：O572.34[理学—粒子物理与原子核物理]