Analytic representation for 3He form factors

A modified N/D method is applied for the cases of 3He charge and magnetic form factors. Anomalous cut positions are computed using possible exchanges at the photon-3He electromagnetic vertex, and one of them is found at tα=0.0618 GeV2. The D-function is used to parametrize the two-pion cut while the N-function is taken to represent the effect of an anomalous or the three-pion cut. Excellent fits to the available experimental data on charge and magnetic form factors are obtained and several useful information on the form factors computed. 17 refs., 9 figures. (author)