Chiral transition in a finite system and possible use of finite size scaling in relativistic heavy ion collisions
Chiral transition in a finite system and possible use of finite size scaling in relativistic heavy ion collisions
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DOI：
10.1088/0954-3899/38/8/085101
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发表时间：
2009-04
期刊：
影响因子：
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通讯作者：
L. Palhares;E. Fraga;T. Kodama
中科院分区：
文献类型：
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作者：
L. Palhares;E. Fraga;T. Kodama
我们研究了夸克耦合的线性σ模型中强相互作用手征相图的有限尺寸效应。我们估计修改的伪临界过渡线和等熵轨迹的大小，是在相对论重离子碰撞实验中创建的系统的代表。这些修正显然是不可忽略的，并且可能会显着影响基于无限系统估计的手性关键终点的特征。我们认为，有限尺寸标度分析应在RHIC的束能量扫描程序的数据分析过程中进行测试，并在FAIR-GSI未来的实验中，通过使用全标度图和卡方方法作为搜索关键端点的工具。
We investigate finite-size effects on the chiral phase diagram of strong interactions within the linear sigma model coupled to quarks. We estimate the modification of the pseudocritical transition line and isentropic trajectories for sizes that are representative of the systems created in relativistic heavy-ion collision experiments. The corrections are clearly non-negligible and might significantly affect signatures of the chiral critical endpoint based on estimates for an infinite system. We argue that a finite-size scaling analysis should be tested in the process of data analysis of the Beam Energy Scan program at RHIC and in future experiments at FAIR-GSI, through the use of full scaling plots and a chi-squared method as tools for searching the critical endpoint.