中能强子与核的散射研究发现，４００ＭｅＶ以上似乎普遍存在着截面理论值偏低的现象，例如，质子－核（ＰＡ）散射、π介子－核（πＡ）散射、ｋ分子－核（ｋＡ）散射的微分戳面传统理论值比实验结果约低２０％．引入相对论动力学可使ＰＡ散射理论结果大为改善。然而，在核子层次上的各种修正对介子－核散射的理论结果改善甚小．人们正在从更深入的非核子自由度寻找原因． Scattering studies of midolasers and nuclei show that there appears to be a common phenomenon of low theoretical cross section values ​​above 400 MeV, such as proton-nuclear (PA) scattering, π-meson-nuclear (πA) scattering, k- The theoretical theoretical value of the differentiated differential surface of the scattering is about 20% lower than the experimental result. The introduction of relativistic dynamics can greatly improve the PA scattering theory. However, various modifications at the nuclear level have little effect on the theoretical results of meson-nuclear scattering. People are looking for a deeper reason from non-nuclear degrees of freedom.