| 论文简介 |
We report on a theoretical study of the reaction near threshold by using an effective Lagrangian approach. The role of channel , channel and channel proton pole diagrams are considered. We show that the total cross sections data are well reproduced. However, only including the wave state and the background contribution from and channel are not enough to describe the bowl structures in the angular distribution of reaction, which indicates that there should be higher partial waves contributing to this reaction in some energy region. Indeed, if we considered the contributions from a resonance, we can describe the bowl structures, however, a rather small width ( MeV) of this resonance is needed. |
(创新港)
