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arXiv · 1102.0269

Ultrasoft NLL Running of the Nonrelativistic O(v) QCD Quark Potential

Andre H. Hoang·Maximilian Stahlhofen
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Abstract

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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Andre H. Hoang, Maximilian Stahlhofen. 2011-02-01. Ultrasoft NLL Running of the Nonrelativistic O(v) QCD Quark Potential. https://doi.org/10.1007/jhep06(2011)088

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