Abstract
A modified six-resonance VMD model for a description of the nucleon electromagnetic structure is constructed. It possesses correct analytic properties and the asymptotic behaviour in accordance with a quark model prediction for baryons. Only parameters with clear physical meaning are contained in the model. They are evaluated numerically in a simultaneous fit of all the existing data on electric and magnetic nucleon form factors. As a result, the behaviour in the timelike region of electric and magnetic neutron form factors, for which there are no data up to now, has been predicted. In comparison with the corresponding behaviour of proton form factors above the nucleon-antinucleon threshold one finds them to exceed by a factor of five. Consequently, the cross-section of\(e^ + e^ - \to n\bar n\) is expected to be roughly twenty-five times as large as the cross-section of\(e^ + e^ - \to p\bar p\).
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