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Precision determination of r(0)Lambda((MS)over-bar) from the QCD static energy

Garcia i Tormo, Xavier ; Soto Riera, Joan ; Vairo, Antonio

Physical review letters, 2010-11 [Periódico revisado por pares]

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Título:
Precision determination of r(0)Lambda((MS)over-bar) from the QCD static energy
Autor: Garcia i Tormo, Xavier ; Soto Riera, Joan ; Vairo, Antonio
Assuntos: Cromodinàmica quàntica ; Particles ; Partícules (Matèria) ; Quantum chromodynamics
É parte de: Physical review letters, 2010-11
Descrição: 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).
Editor: American Physical Society
Idioma: Inglês

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