Institüt für Theoretische Physik, Universität of Tübingen, 72076
Received: 10 March 1999 / Revised version: 14 June 1999 Communicated by F. Lenz
Electromagnetic form factors of protons and neutrons are investigated based on a relativistic quark model with the inclusion of a pion cloud. Pseudo-scalar -quark interaction is employed to study the coupling between the nucleon and the . The results show the important role of the pion cloud for the neutron charge form factor. Moreover, our numerical analysis indicates a difference between the relativistic and the nonrelativistic treatments.
12.39.Jh Nonrelativistic quark model - 12.39.Ki Relativistic quark model - 12.39.Pn Potential models - 12.40.Vv Vector-meson dominance - 12.40.Yx Hadron mass models and calculations - 13.40.Em Electric and magnetic moments - 13.40.Gp Electromagnetic form factors - 13.40.Hq Electromagnetic decays