Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 58: Hadronenstruktur und -spektroskopie IX
HK 58.9: Vortrag
Donnerstag, 24. März 2011, 18:45–19:00, C-2
Electromagnetic properties of the nucleon and Delta(1232)-isobar in chiral EFT — •Tim Ledwig1, Jorge Martin-Camalich2, Vladimir Pascalutsa1, and Marc Vanderhaeghen1 — 1Institut für Kernphysik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany — 2Departamento de Fisica Teorica and IFIC, Centro Mixto, Institutos de Investigacion de Paterna - Universidad de Valencia-CSIC, Spain
Recent lattice QCD and baryon chiral perturbation theory results show some discrepancies, e.g. in the nucleon iso-vector Pauli- and Dirac-radii. In this talk we discuss present progress in the study of the pion-mass and volume dependence of nucleon and Delta(1232)-isobar electromagnetic observables, namely: the nucleon iso-vector anomalous magnetic moment, Dirac- and Pauli-radii and the Delta(1232)-isobar electric quadrupole, magnetic dipole and magnetic octupole moments. In the case of the Delta(1232)-isobar we confront the situation of unstable particles in an external electromagnetic field.