Objectif The matrix elements of the electro-weak mixing matrix, the Cabibbo-Kobayashi-Maskawa matrix, are of importance to many experimental and phenomenological applications in flavour physics. We will address the particular matrix element V(us), which can be extracted from experimental measurements once the kaon semi-leptonic form factors for the K(l3) decay is known. Therefore, we will provide quantitative results for that form factor using numerical simulations of Quantum Chromodynamics on the lattice, i.e. lattice QCD.The hadronic matrix element for the K to pi decay will be measured on gauge configurations produced by the QCDSF collaboration. Those lattice QCD simulations are performed with 2 and 2+1 quark flavours of various masses, where the light quark masses eventually will approach the physical point realized in Nature. The non-perturbative clover improved fermion action is used to simulate the dynamical quark effects. Results for the kaon semi-leptonic form factor at different simulated quark masses will be compared with predictions from chiral perturbation theory. Champ scientifique sciences naturellessciences physiquesphysique théoriquephysique des particulesfermionsciences naturellessciences physiquesphysique théoriquephysique des particulesquarks Programme(s) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Thème(s) FP7-PEOPLE-2009-RG - Marie Curie Action: "Reintegration Grants" Appel à propositions FP7-PEOPLE-2010-RG Voir d’autres projets de cet appel Régime de financement MC-IRG - International Re-integration Grants (IRG) Coordinateur UNIVERSITAET REGENSBURG Adresse Universitatsstrasse 31 93053 Regensburg Allemagne Voir sur la carte Région Bayern Oberpfalz Regensburg, Kreisfreie Stadt Type d’activité Higher or Secondary Education Establishments Contact administratif Johanna Kronberger (Ms.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Contribution de l’UE Aucune donnée
