Electromagnetic Form Factors of Nucleons in a Relativistic Three-Quark Model |
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Authors: | MA Ivanov MP Locher VE Lyubovitskij |
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Institution: | (1) Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, CH |
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Abstract: | We study electromagnetic form factors of nucleons within a relativistic three-quark model with a Gaussian shape for the nucleon-quark
vertex. The allowed regions for two adjustable parameters, the range parameter Λ
N
in the Gaussian and the constituent quark mass m
q
, are obtained from fitting the data for magnetic moments and electromagnetic radii of nucleons. It is found that these observables,
when calculated with m
q
= 420 MeV and Λ
N
= 1.25 GeV, agree very well with the experimental data. For these parameter values, however, our model underestimates the
electromagnetic form factors of the nucleon at high momentum transfers for the calculated range O ≤ Q2≤ 1 GeV2.
Received April 10, 1996; revised June 20, 1996; accepted for publication July 19, 1996 |
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Keywords: | |
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