hQCD模型中QGP相位的某些方面
Some aspects of QGP phase in a hQCD model
摘要：
我们继续研究Einstein-Maxwell-Dilaton（EMD）系统中的全息QCD（hQCD）模型。本文讨论了hQCD模型中夸克-胶子等离子体（QGP）的拖曳力、喷注猝灭参数和屏蔽长度等问题。结果与QCD的预期结果定性一致。通过计算背景黑洞解的自由能，发现当化学势$μ$小于临界值$ μ_c$时，小黑洞与大黑洞之间存在Hawking-Page相变，当化学势超过临界值时，小黑洞与大黑洞之间不存在相变.
英文摘要：
We continue to study the holographic QCD (hQCD) model, proposed in a previous paper, in an Einstein-Maxwell-Dilaton (EMD) system. In this paper we discuss some aspects of quark gluon plasma (QGP) in the hQCD model, such as drag force, jet quenching parameter and screening length. The results turn out to be consistent with those as expected in QCD qualitatively. By calculating free energy of the background black hole solution, we find that there exists a Hawking-Page phase transition between small black hole and big black hole when chemical potential $μ$ is less than a critical one $ μ_c$, and the phase transition is absent when chemical potential is beyond the critical one.
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