非相对论O（v）QCD夸克势的超软NLL运行
Ultrasoft NLL Running of the Nonrelativistic O(v) QCD Quark Potential
摘要：
利用非相对论性有效场论vNRQCD，我们从一个势和两个超软圈的图中确定了v（1/1）阶有效夸克-反夸克势对次领先对数（NLL）运行的贡献，v是夸克在c. m中的速度. frame.这些结果在数值上是重要的，并完整地描述了超软次-次-主导对数（NNLL）级效应在重夸克对产生和湮灭接近阈值。
英文摘要：
Using the nonrelativistic effective field theory vNRQCD, we determine the contribution to the next-to-leading logarithmic (NLL) running of the effective quark-antiquark potential at order v (1/mk) from diagrams with one potential and two ultrasoft loops, v being the velocity of the quarks in the c.m. frame. The results are numerically important and complete the description of ultrasoft next-to-next-to-leading logarithmic (NNLL) order effects in heavy quark pair production and annihilation close to threshold.
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