Nucleon form factors in a relativistic quark model
Y.B. Dong - A. Faessler - K. Shimizu
Institüt für Theoretische Physik, Universität of Tübingen, 72076
Tübingen, Germany
Received: 10 March 1999 / Revised version: 14 June 1999 Communicated by F. Lenz
Abstract
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.
PACS
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
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