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Title: Electromagnetic properties of baryons

We discuss the chiral behavior of the nucleon and {Delta}(1232) electromagnetic properties within the framework of a SU(2) covariant baryon chiral perturbation theory. Our one-loop calculation is complete to the order p{sup 3} and p{sup 4}/{Delta} with {Delta} as the {Delta}(1232)-nucleon energy gap. We show that the magnetic moment of a resonance can be defined by the linear energy shift only when an additional relation between the involved masses and the applied magnetic field strength is fulfilled. Singularities and cusps in the pion mass dependence of the {Delta}(1232) electromagnetic moments reflect a non-fulfillment. We show results for the pion mass dependence of the nucleon iso-vector electromagnetic quantities and present preliminary results for finite volume effects on the iso-vector anomalous magnetic moment.
Authors:
; ;  [1] ;  [2]
  1. Institut fuer Kernphysik, Universitaet Mainz, D-55099 Mainz (Germany)
  2. Departamento de Fisica Teorica and IFIC, Universidad de Valencia-CSIC, Spain and Department of Physics and Astronomy, University of Sussex, BN1 9Qh, Brighton (United Kingdom)
Publication Date:
OSTI Identifier:
21611950
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1388; Journal Issue: 1; Conference: BARYONS' 10: International conference on the structure of baryons, Osaka (Japan), 7-11 Dec 2010; Other Information: DOI: 10.1063/1.3647425; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHIRAL SYMMETRY; CHIRALITY; DELTA-1232 BARYONS; ENERGY GAP; MAGNETIC FIELDS; MAGNETIC MOMENTS; NUCLEONS; PERTURBATION THEORY; PIONS; REST MASS; SINGULARITY; SU-2 GROUPS BARYONS; BOSONS; DELTA BARYONS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; LIE GROUPS; MASS; MESONS; N*BARYONS; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; SU GROUPS; SYMMETRY; SYMMETRY GROUPS