瞬子在胶球和混杂态中等作用

In this project we concentrated on the hardons beyond the na?ve quark model, such as glueballs and hybrid mesons. We have studied their masses, production and decay rates quantitatively. Specially, 1)we calculated the production rate of the scalar glueball in the decay of the meson U 2) we constructed an effective Lagrangian for scalar glueball.With the aid of QCD low energy theorem, we calculated its decay rate to pions. From our calculations, we estimated the gluon content of the glueball candidates .3)We precisely calculated the mass of hybrid mesons with quantum number 1-+ based on QCD sum rules and excluded the possibility of its mass lower than 1.5GeV 4) we are going on the precise calculation of the tensor glueball 5) Our study on the instanton effects on the scalar glueball has preliminary results.

结合关于胶球和混杂态强子的最新试验结果，利用唯象瞬子模型胶球和混杂态强子，希望对其内部结构、质量及衰变特性有定量的了解。同时结合QCD求和规则，希望对瞬子与夸克、胶子凝聚及QCD求和规则本身有进一步了解，反过来，我们也希望通过带价胶子的强子物理对瞬子模型/瞬子密度及相互作用有进一步了解。.