HAL : in2p3-00454546, version 1
 arXiv : 0912.3792
 DOI : 10.1007/JHEP04(2010)001
 Journal of High Energy Physics 4 (2010) 1-18
 Chiral Extrapolation of the Strangeness Changing K pi Form Factor
 (2010)
 We perform a chiral extrapolation of lattice data on the scalar K pi form factor and the ratio of the kaon and pion decay constants within Chiral Perturbation Theory to two loops. We determine the value of the scalar form factor at zero momentum transfer, at the Callan-Treiman point and at its soft kaon analog as well as its slope. Results are in good agreement with their determination from experiment using the standard couplings of quarks to the W boson. The slope is however rather large. A study of the convergence of the chiral expansion is also performed.
 Thème(s) : Physique/Physique des Hautes Energies - RéseauPhysique/Physique des Hautes Energies - Phénoménologie
 Lien vers le texte intégral : http://fr.arXiv.org/abs/0912.3792
 in2p3-00454546, version 1 http://hal.in2p3.fr/in2p3-00454546 oai:hal.in2p3.fr:in2p3-00454546 Contributeur : Sophie Heurteau <> Soumis le : Lundi 8 Février 2010, 17:16:49 Dernière modification le : Mardi 25 Mai 2010, 17:09:09