Two-Loop Ultrasoft Running of the O(v2) QCD Quark Potentials
Andre H. Hoang, Maximilian Stahlhofen
Abstract
The two-loop ultrasoft contributions to the next-to-leading logarithmic (NLL) running of the QCD potentials at order v2 are determined. The results represent an important step towards the next-to-next-to-leading logarithmic (NNLL) description of heavy quark pair production and annihilation close to threshold.
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