Testing the OPE Wilson coefficient for A2 from lattice QCD with a dynamical charm
Gluon and ghost propagators data, obtained in Landau gauge from lattice simulations with two light and two heavy dynamical quark flavours (Nf=2+1+1), are described here with a running formula including a four-loop perturbative expression and a nonperturbative OPE correction dom- inated by the local...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/18566 |
| Acceso en línea: | http://hdl.handle.net/10272/18566 |
| Access Level: | acceso abierto |
| Palabra clave: | OPE Wilson coefficient Lattice QCD QCD Dynamical charm |
| Sumario: | Gluon and ghost propagators data, obtained in Landau gauge from lattice simulations with two light and two heavy dynamical quark flavours (Nf=2+1+1), are described here with a running formula including a four-loop perturbative expression and a nonperturbative OPE correction dom- inated by the local operator A2. The Wilson coefficients and their variation as a function of the coupling constant are extracted from the numerical data and compared with the theoretical ex- pressions that, after being properly renormalized, are known at O( 4). As also ms is rather well known for Nf=2+1+1, this allows for a precise consistency test of the OPE approach in the joint description of different observables. |
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