λQCD from gluon and ghost propagators
Fundamental quantities of QCD, such as the strong coupling and λQCD, are studied in the framework of lattice QCD with Nf = 2 twisted mass fermions. In particular, the contact between lattice and continuous calculations is made by comparing the renormalized ghost-gluon vertex in MOM scheme with 4-loo...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2010 |
| 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:10272/18769 |
| Acceso en línea: | http://hdl.handle.net/10272/18769 |
| Access Level: | acceso abierto |
| Palabra clave: | λQCD Gluon Ghost propagators QCD |
| Sumario: | Fundamental quantities of QCD, such as the strong coupling and λQCD, are studied in the framework of lattice QCD with Nf = 2 twisted mass fermions. In particular, the contact between lattice and continuous calculations is made by comparing the renormalized ghost-gluon vertex in MOM scheme with 4-loop perturbative results. A power correction is needed in order to have agreement between the two descriptions. This suggests the presence of a dimension-two <A2> gluon condensate whose value is found to be higher than in the quanched case. |
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