标量介子f_0(1370),f_0(1500)和f_0(1710)的混合与衰变

Mixing and decay of scalar mesons f_0(1370),f_0(1500) and f_0(1710)

基于3×3质量混合矩阵,我们研究了3个主要的标量胶球候选者——f0(1370),f0(1500)和f0(1710)的夸克胶子组成.利用唯象模型计算它们衰变到赝标量末态的分支比,将结果与最新实验数据进行拟合,我们得到f0(1370),f0(1500)和f0(1710)的味组成.同时,对其他几个衰变分支比进行了预言并发现f0(1370)中|N〉的成分较大,而f0(1500)和f0(1710)更接近于纯胶球态.

Based on a 3 × 3 mass mixing matrix, the gluon-quarkonia contents of the scalar states f0（1370） ,f0（1500） and f0（1710） , which are main candidates for scalar glueballs, are investigated. With a phenomenological model their branching ratios with pseudoscalar final states are calculated, and their flavour contents are obtained by fitting with the newest experimental data. In the mean time, several other decay branching ratios are predicted and are in agreement with experiments. We find that f0 （1370）has large ｜N〉 component, while f0 （1500） and f0 （1710） more close to pure glueball states.