Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-06-10
Phys.Rev.Lett.105:212001,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 2 figures. v2: Minor changes. One reference added. Journal version
Scientific paper
10.1103/PhysRevLett.105.212001
We use the recently obtained theoretical expression for the complete QCD static energy at next-to-next-to-next-to leading-logarithmic accuracy to determine r_0Lambda_MS by comparison with available lattice data, where r_0 is the lattice scale and Lambda_MS is the QCD scale. We obtain r_0Lambda_MS=0.622^{+0.019}_{-0.015} for the zero-flavor case. The procedure we describe can be directly used to obtain r_0Lambda_MS in the unquenched case, when unquenched lattice data for the static energy at short distances becomes available. Using the value of the strong coupling alpha_s as an input, the unquenched result would provide a determination of the lattice scale r_0.
Brambilla Nora
Soto Joan
Tormo Xavier Garcia i.
Vairo Antonio
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