Lattice calculation of 1/p² corrections to αs and of ΛQCD in the MOM scheme.
We report on very strong evidence of the occurrence of power terms in α^MOM(p), the QCD running coupling constant in the ^MOM scheme, by analyzing non-perturbative measurements from the lattice three-gluon vertex between 2.0 and 10.0GeV at zero flavor. While putting forward the caveat that this defi...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2000 |
| País: | España |
| Recursos: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/18764 |
| Acesso em linha: | http://hdl.handle.net/10272/18764 |
| Access Level: | acceso abierto |
| Palavra-chave: | Renormalization Regularization and Renormalons Nonperturbative Effects QCD Lattice QCD |
| Resumo: | We report on very strong evidence of the occurrence of power terms in α^MOM(p), the QCD running coupling constant in the ^MOM scheme, by analyzing non-perturbative measurements from the lattice three-gluon vertex between 2.0 and 10.0GeV at zero flavor. While putting forward the caveat that this definition of the coupling is a gauge dependent one, the general relevance of such an occurrence is discussed. We fit (nf=0) MS = 237 ± 3+ 0 −10MeV in perfect agreement with the result obtained by the ALPHA group with a totally different method. The power correction to α^MOM(p) is fitted to (0.63 ± 0.03+ 0.0 − 0.13)GeV²/p². |
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