Walecka模型中热介质里的介子屏蔽质量

The screening massses of mesons in hot medium for the Walecka model

根据热场动力学计算了Ｗａｌｅｃｋａ模型中σ、ω介子屏蔽质量的温度和密度依赖性。文章考察了真空涨落效应。结果发现真空涨落非常重要并且它将导致在热密介质中ω介子质量的减小以及σ分子质量的增加。

Based on the thermo field dynamics,the temperature and density dependencies of the screening masses of σ, mesons in the Walecka model have been calculated. The vacuum fluctuation effect is examined. It is found that the vacuum fluctuation is very important and leads to a reduction of meson mass and an enhancement of σ-meson mass in hot and dense medium.