重离子碰撞中K+介子的横动能谱
Transverse Kinematical Energy Spectra ofK+ Mesons in Heavy Ion Collisions
DOI: 10.12677/MP.2014.43007, PDF, HTML, XML, 下载: 3,232  浏览: 11,123  国家自然科学基金支持
作者: 邢永忠：天水师范学院物理系，天水；思李飒娃德.彭拉德：那列苏安大学物理系，彭世洛府，泰国；郑玉明：天水师范学院物理系，天水;中国原子能科学研究院，北京
关键词: 重离子碰撞；K产生；横动能谱；在介质中的K+位势；核物态方程；协变的K动力学； 量子分子动力学模型；Heavy Ion Collisions； Kaon Production； The Transverse Kinematical Energy Spectra； The K+ In-Medium Potential； The Nuclear Equation of State； The Covariant Kaon Dynamics； The Quantum Molecular Dynamics Model
摘要: 本文采用基于协变的K动力学的量子分子动力学模型，研究了1.93 AGeV入射能量的58Ni + 58Ni碰撞中产生的K+介子的横动能谱，并讨论了K+介子在介质中的位势对其横动能谱的影响。理论计算显示，只有计入K+介子在核介质中的位势的效应，才能合理地描写KaoS的实验数据。这表明，我们能从K+介子横动能谱的分析中提取出在核介质中K+介子位势的信息。同时，我们发现，K+介子的横动能谱也是一个探测核物态方程的敏感的观测量。
Abstract: We use the quantum molecular dynamics model based on the covariant kaon dynamics to investi- gate the transverse kinematical energy spectra of K+ mesons from 58Ni + 58Ni collisions at 1.93 AGeV, and discuss the influence of the K+ in-medium potential on its transverse kinematical energy spectrum. We observe that the KaoS data can only be reasonably described by calculated results with a repulsive K+N potential. This indicates that one can extract the information on the K+ in-medium potential in a nuclear medium from the analysis of the transverse kinematical energy spectra of K+ mesons. We find that the transverse kinematical energy spectrum of K+ mesons is also a sensitive observable to probe the nuclear equation of state.
文章引用：邢永忠, 思李飒娃德.彭拉德, 郑玉明. 重离子碰撞中K+介子的横动能谱[J]. 现代物理, 2014, 4(3): 50-55. http://dx.doi.org/10.12677/MP.2014.43007

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