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Title: Precision determination of r(0)Lambda((MS)over-bar) from the QCD static energy
Author: Garcia i Tormo, Xavier
Soto Riera, Joan
Vairo, Antonio
Keywords: Partícules (Matèria)
Cromodinàmica quàntica
Quantum chromodynamics
Issue Date: 15-Nov-2010
Publisher: American Physical Society
Abstract: 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(0)Lambda((MS) over bar) by comparison with available lattice data, where r(0) is the lattice scale and Lambda((MS) over bar) is the QCD scale. We obtain r(0)Lambda((MS) over bar) = 0.622(-0.015)(+0.019) for the zero-flavor case. The procedure we describe can be directly used to obtain r(0)Lambda((MS) over bar) 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).
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It is part of: Physical Review Letters, 2010, vol. 105, núm. 21, p. 212001-1-212001-4
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Publicacions de projectes de recerca finançats per la UE

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