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

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

2011-02-01

arxiv.org/abs/1102.0269v2

JHEP 1106:088,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 7 figures, 3 tables; minor modifications, typos corrected, references added, footnote added

Scientific paper

10.1007/JHEP06(2011)088

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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