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arXiv 1208.4683nucl-thhep-ph
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水动力模型下sQGP的时间演化

Time evolution of the sQGP with hydrodynamic models

M. Csanad

摘要:

在相对论核-核碰撞中产生的强相互作用夸克-胶子-等离子体(sQGP)可以用流体力学模型描述。低能强子是在这种介质的所谓冻结之后产生的,因此它们的分布揭示了sQGP终态的信息。光子是在整个演化过程中产生的,所以它们的分布携带着整个膨胀和冷却的信息。我们从一个分析,1+3维完美的相对论流体动力学解决方案的结果,并比较强子和光子观测RHIC数据。我们从这个比较中提取了一个膨胀夸克物质的平均状态方程。本文的第二部分将上述相对论性理想流体力学的解析解推广到任意温度状态方程。我们研究了这类解的特殊情况,特别地,我们给出了由格点量子色动力学计算确定的状态方程的流体力学解。

英文摘要:

The strongly interacting Quark-Gluon-Plasma (sQGP) created in relativistic nucleus-nucleus collisions, can be described by hydrodynamic models. Low energy hadrons are created after the so called freeze-out of this medium, thus their distributions reveal information about the final state of the sQGP. Photons are created throughout the evolution, so their distributions carry information on the whole expansion and cool down. We show results from an analytic, 1+3 dimensional perfect relativistic hydrodynamic solution, and compare hadron and photon observables to RHIC data. We extract an average equation of state of the expanding quark matter from this comparison. In the second part of this paper, we generalize the before mentioned analytic solution of relativistic perfect fluid hydrodynamics to arbitrary temperature-dependent Equation of State. We investigate special cases of this class of solutions, in particular, we present hydrodynamical solutions with an Equation of State determined from lattice QCD calculations.

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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