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arXiv 1909.05037hep-phnucl-th
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用PNJL有效模型探讨有限温度和化学势下的phase diagram和QCD的热力学性质

Exploration of the phase diagram and the thermodynamic properties of QCD at finite temperature and chemical potential with the PNJL effective model

M. Motta, W. M. Alberico, A. Beraudo, P. Costa, R. Stiele

摘要:

从强子到夸克-胶子等离子体相的QCD跃迁在零/小的重子化学势处是一个交叉,而在更高的化学势处,它被认为是一级的,以临界终点结束。目前的目标是确定临界线,并可能识别关键终点。为此,使用具有2+1风味的有效模型(具有Polyakov回路的Nambu-Jona-Lasinio模型)。在平均场近似中,可以得到所有的热力学量(压强、熵、能量和夸克密度)及其涨落,特别是广义夸克数的涨落。我们利用重子数净涨落和奇异数净涨落来确定化学势-温度平面上的临界线和相变的阶数。

英文摘要:

The QCD transition from a hadronic to a quark-gluon plasma phase is a cross-over at vanishing/small baryo-chemical potential, while at higher chemical potentials it is argued that it becomes of first order, ending with a critical end-point. The present goal is the determination of the critical line and, possibly, the recognition of the critical endpoint. For this purpose, the effective model (Nambu-Jona-Lasinio model with Polyakov Loop) with 2+1 flavours is used. In Mean Field Approximation it is possible to obtain all thermodynamic quantities (pressure, entropy, energy and quark density) and their fluctuations, in particular, the generalized quark-number susceptibilities. We use the net baryon-number fluctuations and net-strangeness fluctuations to identify the critical line and the order of the phase transition in the chemical potential - temperature plane.

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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