论文标题
来自对称点的三环顶点的四环QCD MOM Beta函数
Four-loop QCD MOM beta functions from the three-loop vertices at the symmetric point
论文作者
论文摘要
我们首次计算对称点上QCD中所有三个顶点的三环贡献。分析结果是在Landau仪表中具有任意颜色组的无质量QCD中获得的。所有新的循环积分都以统一根源为单位的谐波多层次表示。这些校正使我们能够在一组动量辅助方案中得出四环QCDβ函数的表达式。
For the first time, we compute three-loop contributions to all triple vertices in QCD at the symmetric point. The analytic results are obtained in massless QCD with an arbitrary color group in the Landau gauge. All new loop integrals are expressed in terms of harmonic polylogarithms at the sixth root of unity. These corrections allow us to derive expressions for the four-loop QCD beta function in a set of momentum-subtraction schemes.
