摘要
利用推广的带矢量场的手征SU(3)夸克模型,计算了核子最低负宇称激发态JP=1/2-,3/2-的能量,分析了各种自旋轨道耦合势对能量劈裂的影响.结果表明,利用矢量介子场耦合可以改进计算结果,但是能级的次序和实验还是相反的.在此基础上进一步考虑其他的自旋轨道耦合势,可以给出该激发态正确的能级次序.
We calculate the energies of the lowest excited states of nucleon with negative parity J^P=1/2^-,3/2^-in the extended chiral SU(3) quark model.The effects of various kinds of spin-orbit potential are analyzed.The results can be improved after considering the vector meson exchange,but the energy order is contrary to the experiment.We further consider spin-orbit potentials from two-gluon exchange and confinement,the correct order can be obtained.
出处
《辽宁师范大学学报(自然科学版)》
CAS
2011年第1期34-37,共4页
Journal of Liaoning Normal University:Natural Science Edition
基金
国家自然科学基金项目(10975068)
辽宁省教育厅创新团队项目(2009T055)