有限温度下核子-核子间的单η介子交换势  

One η-Meson Exchange Potential of Nucleon-Nucleon at Finite Temperature

作　　者：郑国桐 苏汝铿[2] 

机构地区：[1]杭州师范学院物理系,310012 [2]复旦大学物理系,上海200433

出　　处：《高能物理与核物理》1992年第2期131-136,共6页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金;国家教委博士点基金

摘　　要：本文用有限温度量子场论的虚对格林函数法讨论η介子与核子相互作用耦合常数和单η分子交换势随温度的变化。我们发现,当温度k_BT上升到215MeV时,耦合常数变为零,核子-核子间的单η介子交换势消失。By means of the imaginary-time Green's function method, the temperature dependences of the η--meson and nucleon interaction coupling constant and one η-meson exchange potential are discussed. We find that when temperature increases to 215 MeV, the coupling constant approaches to zero and the one η-meson exchange potential of nucleon--nucleon disappears.

关 键 词：Η介子 交换势 耦合常数 赝矢 核子 

分 类 号：O572.339[理学—粒子物理与原子核物理]