【摘要】 分别使用线性和非线性Walecka模型 ,讨论了重子标量密度 ρS 和矢量密度 ρB 的关系 .运用相对论平均场理论给出了不同模型下 ρS ρB 关系曲线 .利用这些结果 ,分析了模型和参数组对核物质中K介子有效质量影响的大小 ,得到了不同参数组下K介子有效质量随核物质密度的变化关系曲线 .同时计算了非对称核物质中K介子有效质量在不同模型和不同参数下的有效质量的曲线 ,并与对称核物质中的情况进行了比较 .更多还原

【Abstract】 The linear and nonlinear Walecka model has been used to investigate the relation between the scalar density ρ S and the vector ρ B in the relativistic mean-field approximation and the calculated results of the relation are presented.By using the results,we analyse the parameter effects on the effective masses of kaon and antikaon with different models.The effective masses of kaon and antikaon in asymmetric nuclear matter are also studied by using different models with different parameter sets.The difference of the effective masses between in symmetric and asymmetry nuclear matter is discussed.更多还原