【摘要】 最近杰斐逊实验室测量了中子的两个弹性电磁形状因子之比GEn/GMn,它反映了中子内部的电磁分布并能帮助理解中子的内部结构 .传统的相对论组分夸克模型在解释质子的两种电磁形状因子之比GEp/GMp是很成功的 ,但在解释中子的该比值时计算值比实验值要低 .为了解释这种现象 ,我们在相对论组分夸克模型框架下计算考察了SU(6 )破缺效应的贡献 .发现考虑该破缺效应后的计算结果同实验符合有明显改善 .更多还原

【Abstract】 Recently,the ratio of electric form factor to magnetic form factor for the neutron G E n / G M n ,which contains important pieces of information on the internal structure of nucleon,was measured at the Thomas Jefferson National Accelerator Facility(JLab).The traditional relativistic constituent quark(RCQ)model appears to be successful in explaining the two form factors for the proton G E p / G M p ,however the calculation results for the neutron is much bellow the experiments.For interpreting this phenomenon,we investigate the effects of SU (6) breaking.It is shown that the calculation results gets better close to experiments.更多还原