| 核物质中K介子有效质量与非线性效应 |
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| 引用本文： | 李希国,郭艳蕊,高远,靳根明,李永青. 核物质中K介子有效质量与非线性效应[J]. 原子核物理评论, 2004, 21(3): 183-187. DOI: 10.11804/NuclPhysRev.21.03.183 |
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| 作者姓名： | 李希国 郭艳蕊 高远 靳根明 李永青 |
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| 作者单位： | [1]中国科学院近代物理研究所,甘肃兰州730000.[2]兰州重离子加速器国家实验室原子核理论中心,甘肃兰州730000 |
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| 基金项目： | 中国科学院知识创新工程重点方向性项目(KJCX2 SW No2)，科技部基础重大项目前期研究专项基金资助项目(2002ccb00200)~~ |
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| 摘 要： | 分析了核物质标量密度和矢量密度对K介子有效质量的影响．使用非线性σ-ω-ρ模型和相对论平均场理论，给出了核物质标量密度和矢量密度的近似关系曲线，并与线性σ-ω模型的情况进行了比较．利用这一关系，改进了K介子有效质量和核物质密度之间存在的依赖关系，比较不同模型对K介子有效质量的影响．同时也计算了纯中子物质中K介子在不同模型下的有效质量曲线，并与在对称核物质中的情况进行了比较．We investigate the effect of the nuclear vector density ρ_B and the scalar density ρ_S on in-medium kaon and antikaon effective masses. Based on nonlinear σ-ω-ρ model in the relativistic mean-field approximation, we obtained the relation between the two nuclear densities both σ-ω model and σ-ω-ρ model. By (using) the relation, we improve the dependence of in-medium kaon and antikaon effective masses. We also studied the differences of kaon and antikaon effective mass abtained by...
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| 关 键 词： | 高能物理学 K介子 核物质 有效质量 非线性效应 σ-ω-ρ模型 |
| 文章编号： | 1007-4627(2004)03-0183-05 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 2004-01-13 |
Nonlinear Effects on Effective Mass of Kaon and Antikaon Mesons |
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| LI Xi-guo. Nonlinear Effects on Effective Mass of Kaon and Antikaon Mesons[J]. Nuclear Physics Review, 2004, 21(3): 183-187. DOI: 10.11804/NuclPhysRev.21.03.183 |
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| Authors: | LI Xi-guo |
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| Affiliation: | 1 Institute of Modern Physics; Chinese Academy of Sciences; Lanzhou 730000; China; 2 Center of Theoretical Nuclear Physics; National Laboratory of Heavy Ion Accelerator of Lanzhou; China |
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| Abstract: | We investigate the effect of the nuclear vector density ρ_B and the scalar density ρ_S on in-medium kaon and antikaon effective masses. Based on nonlinear σ-ω-ρ model in the relativistic mean-field approximation, we obtained the relation between the two nuclear densities both σ-ω model and σ-ω-ρ model. By (using) the relation, we improve the dependence of in-medium kaon and antikaon effective masses. We also studied the differences of kaon and antikaon effective mass abtained by... |
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