| △-Resonance Effective Mass in Medium |
| |
| 引用本文： | 李希国,李永青,刘紫玉.△-Resonance Effective Mass in Medium[J].中国物理快报,2007,24(9):2540-2543. |
| |
| 作者姓名： | 李希国 李永青 刘紫玉 |
| |
| 作者单位： | [1]Institute of Modern Physics, Chinese Academy of Sciences, PO Box 31, Lanzhou 730000 [2]Graduate University, Chinese Academy of Sciences, Beijing 100049 [3]Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Collisions, Lanzhou 730000 |
| |
| 基金项目： | Supported by the Knowledge Innovation Project of Chinese Academy of Sciences under Grant Nos KJCX3-SYW-N2 and KJCX2-SW-N16, and the National Natural Science Foundation of China under Grant Nos 10435080 and 10575123. |
| |
| 摘 要： | Based on the relativistic chiral effective field theory, we study the effective mass of the △-resonance in medium by investigating the self-energy of the △-resonance related to the πN decay channel in symmetric nuclear matter. We find that the effective mass of △-resonance decreases evidently with increasing nuclear density p. In our calculation, we also consider the influence of the shifts of the nucleon mass, pion mass and its decay constant due to the restoration of chiral symmetry in medium. The results are roughly consistent with the data given by Lawrence Berkeley National Laboratory.
|
| 关 键 词： | 共振效果 质量 介质 物理学 |
| 收稿时间： | 2007-4-16 |
| 修稿时间： | 2007-04-16 |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《中国物理快报》浏览原始摘要信息 |
| 点击此处可从《中国物理快报》下载免费的PDF全文 |
|
