Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-11-13
Phys.Rev.D79:014508,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
Scientific paper
10.1103/PhysRevD.79.014508
We compute a formula including OPE power corrections to describe the running of a QCD coupling non-perturbatively defined through the ghost and gluon dressing functions. This turns out to be rather accurate. We propose the ``{\it plateau}''-procedure to compute $\Lambda_{\bar{\rm MS}}$ from the lattice computation of the running coupling constant. We show a good agreement between the different methods which have been used to estimate $\Lambda_{\bar{\rm MS}}^{N_f=0}$. We argue that $\Lambda_{\bar{\rm MS}}$ or the strong coupling constant computed with different lattice spacings may be used to estimate the lattice spacing ratio.
Boucaud Ph.
Leroy J.-P.
Micheli J.
Pene Olivier
Rodríguez-Quintero José
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