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arXiv 1502.00648nucl-thhep-lathep-ph
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(2+1)Polyakov夸克介子模型中守恒荷磁化率的符号结构

Sign Structure of Susceptibilities of Conserved Charges in the (2+1) Polyakov Quark Meson Model

Sandeep Chatterjee, Kirtimaan A. Mohan

摘要:

在类QCD模型:(2+1)味Polyakov夸克介子模型中研究了守恒荷关联的符号结构。我们计算了$(μ_{B}-T)$平面上的守恒电荷的四阶和几个高阶的所有非线性。通过改变σ介子的质量,我们能够研究和比较有和没有临界点的情况。在强子-夸克过渡制度,我们确定某些相关性,不像理想强子共振气体计算的预期变成负的。最显著的特点是,它们在强子的深处仍然是负的,因此可以在实验中测量。在重离子碰撞实验中对这些量的测量可以阐明QCD跃迁曲线的位置和可能的临界点。

英文摘要:

The sign structure of correlations of conserved charges are investigated in a QCD like model: the (2+1) flavor Polyakov Quark Meson model. We compute all susceptibilities of the conserved charges on the $(μ_{B}-T)$ plane up to fourth order and a few at higher order as well. By varying the mass of the sigma meson, we are able to study and compare scenarios with as well as without a critical point. In the hadron-quark transition regime we identify certain correlations that turn negative unlike expectation from ideal hadron resonance gas calculations. The striking feature being that these remain negative deep into the hadronic side and thus could be measured in experiments. Measurement of such quantities in heavy ion collision experiments can elucidate the location of the QCD transition curve and possibly the critical point.

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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