Pion electroproduction from the nucleon near threshold

We investigate the dependence on production amplitude of the low energy scattering cross section for positive pion electroproduction from the nucleon. Calculations based on the threshold approximation to the full amplitudes of Dombey and Read are illustrated and compared to results for the full amplitudes. Inclusion of the momentum-dependent terms yields differential cross sections in the near-threshold region differing from those given by the threshold approximation by no more than 15% at any angle.