Differential Cross Section of DP-Elastic Scattering at Intermediate Energies

The deuteron-proton elastic scattering is studied in the multiple scattering expansion formalism. The contributions of the one-nucleon-exchange, single- and double scattering are taken into account. The Love and Franey parameterization of the nucleon-nucleon $t$-matrix is used, that gives an opportunity to include the off-energy-shell effects into calculations. Differential cross sections are considered at four energies, $T_d=390, 500, 880, 1200$ MeV. The obtained results are compared with the experimental data

NN INELASTIC CHANNELS - EXPERIMENTAL REVIEW

Une moisson de données sur la polarisation dans les canaux inélastiques nucléon-nucléon a été accumulée au cours de la dernière décennie. De ce fait une comparaison détaillée avec plusieurs approches théoriques du système πNN est devenue possible. Il y a accord qualitatif pour la plupart des données, mais plusieurs questions sont encore en suspens, telle l'origine du problème du spin triplet. Il y a eu aussi de gros progrès dans les analyses en onde partielle. Sur la base de celles-ci, on doit conclure que les structures de type résonance dans les ondes partielles NN1D2 et 3F3 ne sont pas de vraies résonances, mais des effets de seuil, dus à l'ouverture de la voie du canal NƊ. Des résultats intéressants ont été obtenus pour l'interaction à courte portée NƊ. Une forte attraction de seuil est observée dans l'état 5S2NƊ. Il semble donc que notre compréhension du système πNN a fait des progrès considérables.A wealth of polarization data has been accumulated for the inelastic nucleon-nucleon channels during the last decade. Due to them a detailed comparison with several theoretical approaches to the πNN system became possible. There is qualitative agreement with most of the data, but there are still many open questions, like the origin of the spin triplet problem. There has also been great progress in partial wave analyses. On the basis of those one must conclude that the resonance like structures in the NN1D2 and 3F3 partial waves are not true resonances but threshold effects, due to the opening up of the NƊ channel. Interesting results have been obtained for the short range NƊ interaction. A strong threshold attraction is observed in the 5S2NƊ state. It appears that we have come considerably closer to an understanding of the πNN system