A Systematic distorted wave impulse approximation analysis of the conventional mechanism for pion double charge exchange. (In Chinese)

Le résumé fourni par la source

In the framework of the distorted wave impulse approximation, a systematic analysis is performed for the contribution from the conventional mechanism to the double charge exchange to the double isobaric analog state. The effects of distortions of pions, nuclear wave functions, short-range correlation functions, parameters of form factors, the spin-dependent term in the πN amblitude etc. are examined. It is shown that all these elements are very important and not negligible for the conventional mechanism. But after including the effects of all these elements, the conventional mechanism is still not able to reproduce the experimental excitation function and angular distribution for the energy region of 0-300 MeV, therefore the effects of some other mechanisms should be included.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.