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arXiv 0904.4830nucl-thhep-ph
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有限体系中的手征跃迁和有限尺寸标度在相对论重离子碰撞中的可能应用

Chiral transition in a finite system and possible use of finite size scaling in relativistic heavy ion collisions

L. F. Palhares, E. S. Fraga, T. Kodama

摘要:

本文研究了夸克耦合的线性西格玛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。校正显然是不可忽略的,可能会显着影响签名的手性关键终点的基础上估计一个无限的系统。我们认为,有限尺寸标度分析应在RHIC的束流能量扫描计划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。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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