arXiv:hep-ph/0610143·v2·High Energy Physics — Phenomenology
The logarithmic contribution to the QCD static energy at NNNNLO
Nora Brambilla🇮🇹 · Xavier Garcia i Tormo🇺🇸 · Joan Soto🇪🇸 · Antonio Vairo🇮🇹
Abstract
Using pNRQCD and known results for the field strength correlator, we calculate the ultrasoft contribution to the QCD static energy of a quark-antiquark pair at short distances at NNNNLO in alpha_s. At the same order, this provides the logarithmic terms of the singlet static potential in pNRQCD and the log alpha_s terms of the static energy.
Comments: 16 pages, 5 figures. Minor modifications. References added. Journal version