混合效应在QCD求和规则下对标量胶球质量的影响(英文)

Mixing Effect on the Scalar Glueball Mass in QCD Sum Rules

在QCD求和规则的框架下考虑了纯胶球和普通介子态的混合效应对二者质量的影响．在关联函数的构造中，胶子流和夸克流都被认为既和胶球态有耦合，也和夸克态有耦合．利用QCD低能定理，构造了一个混合关联函数．通过这些关系及两共振态近似，得出了0++胶球和夸克态的质量，它们与各自的纯态的质量相差不大．

We consider the mass dependence on the mixing between a pure glueball and a normal qq meson in QCD sum rules. In the normal correlation functions, the gluonic current and qq current are assumed to couple to both glueball and qq states. By using the low-energy theorem, we construct a sum rule for the mixing correlation function (the gluonic current and the qq current). Through these relationships and based on the assumption of two states (one glueball and one qq meson) dominance, we find the masses of the 0++ lowest-lying glueball and qq meson.