From the gluon DSEs we clearly know that quark loops are contained in the dressed gluon propagator.However, in the previous studies this effect is often neglected.

• 在DS 方程中我们清楚地知道完全的胶子传播子应该包含夸克圈的效应，但是在过去的研究工作中常常忽略这样的效应。