摘要
分析了核物质标量密度和矢量密度对K介子有效质量的影响.使用非线性σ ω ρ模型和相对论平均场理论,给出了核物质标量密度和矢量密度的近似关系曲线,并与线性σ ω模型的情况进行了比较.利用这一关系,改进了K介子有效质量和核物质密度之间存在的依赖关系,比较不同模型对K介子有效质量的影响.同时也计算了纯中子物质中K介子在不同模型下的有效质量曲线,并与在对称核物质中的情况进行了比较.
We investigate the effect of the nuclear vector density ρ_B and the scalar density ρ_S on in-medium kaon and antikaon effective masses. Based on nonlinear σ-ω-ρ model in the relativistic mean-field approximation, we obtained the relation between the two nuclear densities both σ-ω model and σ-ω-ρ model. By (using) the relation, we improve the dependence of in-medium kaon and antikaon effective masses. We also studied the differences of kaon and antikaon effective masses abtained by using the linear σ-ω model and the nonlinear σ-ω-ρ model. At the same time, we presented the kaon and antikaon effective masses in neutron matter and analysed the differences in neutron matter and in nuclear matter.
出处
《原子核物理评论》
CAS
CSCD
北大核心
2004年第3期183-187,共5页
Nuclear Physics Review
基金
中国科学院知识创新工程重点方向性项目(KJCX2 SW No2)
科技部基础重大项目前期研究专项基金资助项目(2002ccb00200)~~
