核物质中的夸克凝聚与介子—核子耦合常数的密度相关性

基于相对论平均场理论计算了核物质中夸克凝聚的高阶贡献，其中考虑了介子－核子耦合常数的密度相关性，这种相关性是由核物质的相对论Ｂｒｕｅｃｋｎｅｒ－Ｈａｒｔｒｅｅ－Ｆｏｃｋ理论结果得到的。

IN MEDIUM QUARK CONDENSATE AND DENSITY DEPENDENT MESON NUCLEON COUPLING

Higher order contributions to the in medium quark condensate are evaluated based on relativistic mean field theory, in which the meson nucleon coupling constants are made density dependent and obtained from the relativistic Brueckner Hartree Fock results of nuclear matter. We find that besides a large cancellation of the scalar and vector meson contributions to the in medium quark condensate, there is an additional cancellation mechanism between the terms involving the derivatives of the nucleon mass and the coupling constants with respect to current quark mass. The net effect of the overall higher order contributions is rather small. This suggests that the model independent leading order results of the in medium quark condensate may be sufficient for studying nuclear phenomena at low and higher densities.