Data on the production of vector mesons ρ and ω in the backward direction via nucleon exchange areinvestigated. A bett......

用标准σ－ω混合方法所构造的介子介电函数，计算了核物质中σ，ω介子的集体激发能谱，并考虑ρ°－ω混合对色散关系的影响很小。......