Threshold π0 electroproduction on hydrogen at −k2 = 0.88 (GeV/c)2

Abstract We have measured pπ 0 electroproduction at − k 2 = 0.88 (GeV/ c ) 2 near threshold. Comparison with models shows that a ‘weak PCAC’ model, a fixed- t dispersion relation model and a pseudo-vector-Born approximation all adequately describe the small threshold cross section. Away from threshold the cross section dependence suggests that the pseudo-vector-Born approximation is not adequate.