Study of Σ*-Δ Interactions
Study of Σ*-Δ Interactions
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摘要: We study the Σ*Δ interaction in the chiral SU(3) quark model and in the extended chiral SU(3) quark model. In these two models, the shortrange interaction mechanism are totally different, one is from the onegluon exchange and another is from the vector meson exchange. The possible reasons of forming strangeness -1 bound states are given. Comparisons between the cases with and without quark exchange effect are made. The results show the quark exchange effect does give attractions to (Σ*Δ)ST=0 52 and (Σ*Δ)ST=3 12 systems, which means the special symmetry is important. Also, we make some analysis on chiral field effect, our results show that the σ exchange dominantly provides the attractive interaction for these two states.
Abstract: We study the Σ*Δ interaction in the chiral SU(3) quark model and in the extended chiral SU(3) quark model. In these two models, the shortrange interaction mechanism are totally different, one is from the onegluon exchange and another is from the vector meson exchange. The possible reasons of forming strangeness -1 bound states are given. Comparisons between the cases with and without quark exchange effect are made. The results show the quark exchange effect does give attractions to (Σ*Δ)ST=0 52 and (Σ*Δ)ST=3 12 systems, which means the special symmetry is important. Also, we make some analysis on chiral field effect, our results show that the σ exchange dominantly provides the attractive interaction for these two states.
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