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arXiv 1507.04764hep-phnucl-th
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寻找QCD临界点时的临界波动与虚假波动

Critical versus spurious fluctuations in the search for the QCD critical point

Maurício Hippert, Eduardo S. Fraga, Edivaldo M. Santos

摘要:

QCD手征临界点附近的特征在于手征场的强烈涨落,原则上,这可以产生明显的实验特征。然而,重离子碰撞所固有的实验不确定性,以及形成的等离子体的适度大小和持续时间,将严重削弱这些签名。使用Monte Carlo技术,我们研究了π介子的二阶逐事件矩作为手征临界点签名的原型,基于增强的相关长度和逐事件分析。我们测试了它们对一些现实成分的可行性,类似于RHIC束能量扫描程序中发现的成分。

英文摘要:

The neighborhood of the QCD chiral critical point is characterized by intense fluctuations of the chiral field which could, in principle, generate pronounced experimental signatures. However, experimental uncertainties which are inherent to heavy ion collisions, as well as the modest size and duration of the formed plasma, will severely attenuate these signatures. Using Monte Carlo techniques, we study second-order event-by-event moments of pions as a prototype for signatures of the chiral critical point based on the enhancement of the correlation length and event-by-event analysis. We test their viability against some realistic ingredients, similar to the ones found in the RHIC Beam Energy Scan program.

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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