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QCD微扰理论和原子核(2)核子-介子耦合顶点的结构
QCD PERTURBATION THEORY FOR CONFINED QUARKS AND NUCLEI——(2) THE STRUCTURE OF THE NUCLEON-MESON COUPLING
【摘要】 利用禁闭夸克系统的QCD低阶微扰,讨论了核子-介子耦合顶点的结构。在MIT袋模型球腔近似下,导出了从核子→核子(重子)+介子顶点结构的几率振幅。在不考虑末态重子与介子的分裂和相对运动时的计算表明,相应于核子-核子相互作用中的激发态重介子(B、δ、A1…)交换和有激发态重子(N*、Δ*)为中间态的双π交换过程是主要的。但单π、单ρ、ω等介子交换过程未出现。
【Abstract】 The structure of the nucleon-meson coupling is discussed on the basis of QCDperturbation theory. The transition amplitude for the Nucleon-Nucleon (Baryon) +Meson is obtained in the spherical cavity approximation of MIT bag model. From theanalysis of these amplitude (probability) it shows that the exchange of heavy mesonsof the first excited state (B, δ, A1,...) and the 2π exchange (intermediate states N*.△*) are important in the zero range N-N interaction. However, the one-pion and onep、ω. etc do not appear.
- 【文献出处】 高能物理与核物理 ,High Energy Physics and Unclear Physics , 编辑部邮箱 ,1982年02期
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