Intrinsic charge radius of the neutron: Discrepancy between the Garching and Dubna results

This Rapid Communication discusses possible reasons for the discrepancy between the results of the Garching and Dubna determinations of the mean square intrinsic charge radius of the neutron related to the inner structure of the neutron. It is shown that the most probable reason for the discrepancy between the values for bismuth is the differences in accounting for the influence of negative energy resonances on the (ne)-scattering length value measured in the experiments. The Dubna result seems to be more reliable for the present.