Electromagnetic form factors of nucleons in a relativistic three-quark model

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 ${\Lambda }_N$ in the Gaussian and the constituent quark mass $m_q$, is obtained from fitting the data for magnetic moments and electromagnetic radii of nucleons. The shapes of electric and magnetic nucleon form factors calculated in this approach with the central parameters $m_q$=420 MeV and ${\Lambda }_N$=1.25 GeV are close to the data for momentum transfers $0\le Q^2\le 1$ GeV${}^2$

Comments: 23 pages, Postscript File, 7 Figures, 3 Tables