轴矢量介子f_1(1282)在手征孤立子模型中的效应——f_1对于静态质量和转动惯量的贡献  

Effect of Axial Vector Meson f_1 (1282) in Chiral Soliton Model ——Contributions of f_1 to Static Mass and Moment of Inertia

作　　者：李金屏[1] 袁志华[2] 闫沐霖 

机构地区：[1]山东建材工业学院信息与控制工程系,山东济南250022 [2]河南农业大学机电学院,河南郑州450002 [3]中国科技大学天文与应用物理系,安徽合肥230026

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 )

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.

关 键 词：手征孤立子模型 轴矢量介子f1(1282) 静态质量 

分 类 号：O572.246[理学—粒子物理与原子核物理] O572.339[理学—物理]