| HAL : in2p3-00738313, version 1 |
| arXiv : 1210.1053 |
| DOI : 10.1016/j.nuclphysbps.2012.12.017 |
| Fiche détaillée | Récupérer au format |
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| 16th International Conference in Quantum ChromoDynamics (QCD12), Montpellier : France (2012) |
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| Lattice measurement of \alpha_s with a realistic charm quark |
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| B. Blossier1Ph. Boucaud1M. Brinet2F. De SotoX. Du2V. Morenas3O. Pene1K. Petrov4J. Rodriguez-Quintero |
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| (2013) |
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| We report on an estimate of \alpha_s, renormalised in the MSbar scheme at the tau and Z^0 mass scales, by means of lattice QCD. Our major improvement compared to previous lattice calculations is that, for the first time, no perturbative treatment at the charm threshold has been required since we have used statistical samples of gluon fields built by incorporating the vacuum polarisation effects of u/d, s and c sea quarks. Extracting \alpha_s in the Taylor scheme from the lattice measurement of the ghost-ghost-gluon vertex, we obtain \alpha_s^{MSbar}(m^2_Z)=0.1200(14) and \alpha_s^{MSbar}(m^2_tau)=0.339(13). |
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| Thème(s) | : | Physique/Physique des Hautes Energies - Réseau Physique/Physique des Hautes Energies - Phénoménologie |
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| Lien vers le texte intégral : |
| in2p3-00738313, version 1 | |
| http://hal.in2p3.fr/in2p3-00738313 | |
| oai:hal.in2p3.fr:in2p3-00738313 | |
| Contributeur : Emmanuelle Vernay | |
| Soumis le : Jeudi 4 Octobre 2012, 08:35:33 | |
| Dernière modification le : Jeudi 18 Avril 2013, 11:07:26 | |