Nucleon Form Factors in a Relativistic Three-Quark Model
M. A. Ivanov, M. P. Locher, V. E. Lyubovitskij
Abstract
We report the calculation of electromagnetic form factors of nucleons within a relativistic three-quark model with Gaussian shape for the nucleon-quark vertex. The allowed region for two adjustable parameters, the range parameter ΛN in the Gaussian and the constituent quark mass mq, is obtained from fitting the data for magnetic moments and electromagnetic radii of nucleons. It is found that their values calculated with mq=420 MeV and ΛN=1.25 GeV agree very well with the experimental data. It is turned out that the electric proton and magnetic nucleon form factors fall faster than the dipole fit of the experimental data for momentum transfers 0 Q2 1 GeV2.
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