353 articles – 2820 Notices  [english version]
 HAL : in2p3-00150076, version 1
 arXiv : hep-ph/0411230
 10th International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2004), Pekin : Chine
 A phenomenological determination of the pion-nucleon scattering lengths from pionic hydrogen
 (2004)
 A model independent expression for the electromagnetic corrections to a phenomenological hadronic pion-nucleon scattering length, extracted from pionic hydrogen, is obtained. In a non-relativistic approach and using an extended charge distribution, these corrections are derived up to terms of order (alpha)**2 log(alpha) in the limit of a short-range hadronic interaction. We infer a charged pion-proton scattering length of 0.0870(5) in units of inverse pion mass, which gives for the charged pion-proton-neutron coupling, through the GMO relation, a value of 14.04(17).
 Thème(s) : Physique/Physique des Hautes Energies - Phénoménologie
 Mot(s)-clé(s) : \$\piN\$ scattering lengths – pionic hydrogen – extended charge distribution and short-range hadronic interaction
 Lien vers le texte intégral : http://fr.arXiv.org/abs/hep-ph/0411230
 in2p3-00150076, version 1 http://hal.in2p3.fr/in2p3-00150076 oai:hal.in2p3.fr:in2p3-00150076 Contributeur : Dominique Girod <> Soumis le : Mardi 29 Mai 2007, 13:59:01 Dernière modification le : Mardi 29 Mai 2007, 14:01:11