摘要
在BHF理论框架内 ,利用两体现实核力和微观三体核力研究了核物质状态方程 ,仔细计算和分析了核介质中不同的基本微观过程导致的三体核力对核物质状态方程的贡献 ,与相对论DBHF方法的计算进行了比较 .结果表明 ,DBHF方法中包含的对核物质状态方程的主要相对论修正来自于核介质中伴随着自由核子 -反核子对虚激发中间过程对核子相互作用中标量σ介子交换过程介质修正效应所导致的三体核力 ,而来自于其他的基本微观过程的三体核力对核物质状态方程的贡献并不能完全相互抵消 。
Within Brueckner Hartree Fock framework,the equation of state of nuclear matter has been investigated by adopting the charge dependent Argonne V 18 two body realistic force and the microscopic three body forces based on a meson exchange model. The contributions to the equation of state from the three body forces due to different microscopic elementary processes have been calculated and discussed carefully. It is shown by comparing with the results from the relativistic Dirac BHF approach that the main relativistic correction to nuclear equation of state can be reproduced fairly well by the present Brueckner Hartree Fock calculations including only the three body force originated from the scalar σ meson exchange coupling to the virtual excitation of a nucleon antinucleon pair. However,the effects of the three body forces due to other processes can not be cancelled completely with each other,and even around the saturation density of nuclear matter,their net contribution is not neglegible.
出处
《高能物理与核物理》
CSCD
北大核心
2002年第11期1134-1141,共8页
High Energy Physics and Nuclear Physics
基金
中国科学院"百人计划"基金
国家重点基础研究发展规划基金(G2 0 0 0 077400)
中国科学院知识创新工程重点方向项目(KJCX2 SW N0 2 )
兰州重离子国家实验室原子核理论研究中心课题基金资助~~
