Three-Nucleon Experiments andS2Defects

Publisher Website
Google Scholar
Abstract
Supported by the results of recent theoretical calculations of nucleon-deuteron scattering, it is suggested that most parts of the calculated three-nucleon scattering and breakup amplitudes are model-independent at low energies and, furthermore, that the S2-state amplitudes are the important exception to this rule. On the basis of the assumption that it is only differences between theoretical and physical S2 amplitudes which will remain substantial as calculations improve, a new approach to the experimental three-nucleon problem is proposed. According to this approach, experiments would be chosen on the basis of the sensitivity to S2 amplitudes and would be analyzed by using theoretical predictions for the amplitudes and empirically adjusted S2 defects. Experiments expected to be sensitive to the S2 amplitudes are discussed including angular distributions, spin-correlation measurement, and experiments of the triple-scattering type. Formulas for these parameters are given in terms of amplitudes having the simple structure predicted by the Amado model and it is shown how the S2 defects will modify such predictions.