arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0901.1903hep-phhep-thnucl-th
收藏

寻找QCD-引力对应

In search of the QCD-Gravity correspondence

Theodor Brasoveanu, Dmitri Kharzeev, Mauricio Martinez

摘要:

量子色动力学(QCD)是研究强相互作用的基础理论。它描述了夸克和胶子的行为,它们是核物质已知的最小成分。在强相互作用、非微扰的低能量下解决这个理论的困难留下了QCD中许多重要问题的答案,例如禁闭的性质或强子化的机制。在这些面向学生的讲座中,我们介绍了两类对偶性,它们试图再现QCD的许多特征,同时使强耦合的处理更容易:(1)一类特定的弦论和共形场论之间的AdS/CFT对应;(2)在弯曲共形引力背景下与经典QCD对偶的有效低能QCD理论。我们希望通过应用这些对偶性来评估重离子碰撞中产生的强相互作用物质的各种性质,人们可以理解QCD在强耦合下的行为。我们给出了一个应用的轮廓,重点是QCD物质的两个输运系数-剪切和体积粘度。

英文摘要:

Quantum Chromodynamics (QCD) is the fundamental theory of strong interactions. It describes the behavior of quarks and gluons which are the smallest known constituents of nuclear matter. The difficulties in solving the theory at low energies in the strongly interacting, non-perturbative regime have left unanswered many important questions in QCD, such as the nature of confinement or the mechanism of hadronization. In these lectures oriented towards the students we introduce two classes of dualities that attempt to reproduce many of the features of QCD, while making the treatment at strong coupling more tractable: (1) the AdS/CFT correspondence between a specific class of string theories and a conformal field theory and (2) an effective low-energy theory of QCD dual to classical QCD on a curved conformal gravitational background. The hope is that by applying these dualities to the evaluation of various properties of the strongly-interacting matter produced in heavy ion collisions one can understand how QCD behaves at strong coupling. We give an outline of the applications, with emphasis on two transport coefficients of QCD matter -- shear and bulk viscosities.

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。

↑