Self-consistent quasiparticle model for quark-gluon plasma
Self-consistent quasiparticle model for quark-gluon plasma
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DOI：
10.1103/physrevc.75.044905
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发表时间：
2006-09
影响因子：
3.1
通讯作者：
V. M. Bannur
中科院分区：
文献类型：
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作者：
V. M. Bannur
在这里，我们提出了夸克-胶子等离子体（QGP）的自洽准粒子模型，并将其应用于解释晶格模拟中看到的非理想行为。借用自电动等离子体的基本思想是，胶子在通过等离子体传播时由于集体效应而获得质量，并且大约等于等离子体频率。通过将其视为大质量胶子的理想气体来研究这种系统的统计力学和热力学。由于质量或等离子体频率取决于密度，而密度本身就是一个热力学量，因此整个问题需要自洽地解决。这种新的 QGP 准粒子模型通过仅调整单个唯象参数就很好地解释了胶子等离子体的晶格模拟结果。此外，我们扩展了我们的模型，使用精确的超相对论色散关系来研究胶子等离子体，并再次获得了与晶格结果的良好拟合。
Here we present a self-consistent quasiparticle model for quark-gluon plasma (QGP) and apply it to explain the nonideal behavior seen in lattice simulations. The basic idea, borrowed from electrodynamic plasma, is that the gluons acquire mass as they propagate through plasma due to collective effects and are approximately equal to the plasma frequency. The statistical mechanics and thermodynamics of such a system is studied by treating it as an ideal gas of massive gluons. Since mass or plasma frequency depend on density, which itself is a thermodynamic quantity, the whole problem needs to be solved self-consistently. This new quasiparticle model of QGP explains remarkably well the lattice simulation results of gluon plasma by adjusting just a single phenomenological parameter. Further, we extend our model to study gluon plasma using the exact, ultrarelativistic dispersion relation and again obtain a good fit to lattice results.