arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0811.4708hep-phnucl-th
收藏

手征相变附近的输运系数

Transport coefficients near chiral phase transition

C. Sasaki, K. Redlich

摘要:

分析了有限温度和密度下组分夸克组成的相对论流体的输运性质。我们重点研究了剪切粘度和体相粘度,并研究了它们在手性相变附近的行为。我们通过Nambu-JonaLasinio拉格朗日模型的组分夸克相互作用。输运系数在弛豫时间近似下的动力学理论计算,包括准粒子色散关系的介质修正。我们量化的手征相变的顺序和临界端点的耗散现象在这样的介质中的影响。考虑到剪切粘度和体相粘度沿相边界的变化,讨论了它们对临界终点存在的敏感性。

英文摘要:

We analyze the transport properties of relativistic fluid composed of constituent quarks at finite temperature and density. We focus on the shear and bulk viscosities and study their behavior near chiral phase transition. We model the constituent quark interactions through the Nambu--Jona Lasinio Lagrangian. The transport coefficients are calculated within kinetic theory under relaxation time approximation including in--medium modification of quasi--particles dispersion relations. We quantify the influence of the order of chiral phase transition and the critical end point on dissipative phenomena in such a medium. Considering the changes of shear and bulk viscosities along the phase boundary we discuss their sensitivity to probe the existence of the critical end point.

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。

↑