摘要
从U (2 ) L ×U (2 ) R 手征孤立子模型出发 ,通过(πωf1 )模型考察了轴矢量介子 f1 (1 2 82 )对于孤立子转动惯量和重子多重态质量劈裂的影响。通过 f1 对转动惯量贡献的计算发现 :1 .f1 对于转动惯量具有一定的减小作用 ,但是量级很小 ,这表明以往忽略 f1 的研究是近似合理 ,f1 介子的引入可以略微增大质量劈裂 ;2 .在合理选取ω与重子流耦合常数的情况下 ,得到的静态质量与实验比较符合。这是首次对 f1 介子在手征孤立子模型中的效应进行定量估算。
From U(2) L×U(2) R chiral meson theory, the effect of axial vector meson f 1(1282) on the moment of inertia and the mass splittings of solitons are studied in the model of ( πωf 1). Through the computation of contribution of f 1 to mass splittings, we found: 1. The moment of inertia becomes a little smaller due to the introduction of f 1, which could enhance the mass splittings slightly, even though the effect is not remarkable. This fact indicates it reasonable to neglect the f 1 in the previous studies. 2. If the coupling constant between ω and baryon current could be determined properly, the obtained solitonic static mass would be compatible with the experiment data. This is the first time to assess quantitatively the effect of f 1 in the chiral soliton model.
出处
《山东建材学院学报》
2000年第3期212-215,241,共5页
Journal of Shandong Institute of Building Materials
基金
山东省自然科学基金资助项目! (Q98G0 2 1 51 )
