有限温度和有限密度下的汤川势  

Yukawa Potential at Finite Temperature and Finite Density

作　　者：钱志新 钟万蘅[1] 苏汝铿[1] 

机构地区：[1]复旦大学物理系,上海200433

出　　处：《高能物理与核物理》1993年第5期417-422,共6页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金;国家教委资金

摘　　要：利用实时格林函数方法,本文推广汤川势至有限温度和有限密度情况.我们发现,σ介子的有效质量随温度和/或密度升高而减小.本文还对由实时格林函数给出的结果和由虚时格林函数给出的结果进行了比较.By means of the real time Green's function method, the yukawa potential is extended to finite temperature and finite density. It is found that the effective mass of sigma meson will decrease as the temperature and/or density increase. The results given by the real time Green's function method and the imaginary time Green's function method are compared.

关 键 词：汤川势 温度 密度 有限 格林函数 

分 类 号：O413.3[理学—理论物理]