arXiv 1407.24732014-07hep-phhep-latnucl-th

硬热圈微扰理论在夸克-胶子等离子体中的应用

Some Applications of Hard Thermal Loop Perturbation Theory in Quark Gluon Plasma

Najmul Haque

备注：: 248 pages, 54 figures, doctoral thesis submitted and defended at Homi Bhabha National Institute; v2:references added, some typos fixed, few minor revisions

摘要：

本文主要研究量子色动力学的热力学性质。在这篇论文中，我应用硬热圈微扰理论，这是一个规范不变的重组的传统微扰展开的量子规范理论，研究热力学QCD在有限温度和有限化学势的领先，次领先和次次领先的顺序。并讨论了各种阶对角夸克数和非对角夸克数在首阶和超越首阶的可调性。对于所有的观测量，我比较我们的结果与现有的格点量子色动力学的数据，我们发现很好的协议。在计算热密物质的热力学量的同时，还讨论了热密介质中低质量双轻子率的微扰和非微扰模型，并与格点规范理论和介质中强子气体的结果进行了比较。

英文摘要：

This thesis is mainly devoted to the study of thermodynamics for quantum Chromodynamics. In this thesis I apply hard-thermal-loop perturbation theory, which is a gauge-invariant reorganization of the conventional perturbative expansion for quantum gauge theories to study the thermodynamics of QCD in leading-order, next-to-leading-order and next-to-next-to-leading order at finite temperature and finite chemical potential. I also discuss about various order diagonal and off-diagonal quark number susceptibilities in leading order as well as beyond leading order. For all the observables, I compare our results with available lattice QCD data and we find good agreement. Along with the computation of thermodynamic quantities of hot and dense matter, I also discuss about low mass dilepton rate from hot and dense medium using both perturbative and non-perturbative models and compare them with those from lattice gauge theory and in-medium hadron gas.

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。

摘要：

英文摘要：

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