Título:
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Precision determination of r(0)Lambda((MS)over-bar) from the QCD static energy
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Autor/a:
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Garcia i Tormo, Xavier; Soto Riera, Joan; Vairo, Antonio
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Otros autores:
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Universitat de Barcelona |
Abstract:
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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). |
Materia(s):
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-Partícules (Matèria) -Cromodinàmica quàntica -Quantum chromodynamics -Particles |
Derechos:
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(c) American Physical Society, 2010
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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American Physical Society
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