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arXiv 1306.2943hep-ph
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SU(2)2+1维规范理论的矩阵模型

Matrix model for deconfinement in an SU(2) gauge theory in 2+1 dimensions

Pedro Bicudo, Robert D. Pisarski, Elina Seel

摘要:

我们用矩阵模型描述了三维时空中SU(2)规范理论在非零温度T下的解禁闭。在一个循环阶,常矢势A0的势是~T^3乘以A0/T的三对数函数。此外,我们增加了各种非微扰的条款,模型解除限制。通过拟合压力的晶格结果来调整模型的参数。非微扰项由常数项~T^2Td支配,其中Td是解除禁闭的温度。除了这个常数,我们还增加了A0/T的非平凡函数项,即~T^2Td和~TTd^2。对这些非常数项的细节只有轻微的敏感性。总的来说,我们发现一个很好的协议与晶格的结果。对于压力、共形异常和Polyakov环,非常数项仅在~1.2Td以下的狭窄区域内相关。我们还计算了't Hooft循环,发现非常数项的细节进入了一个更宽的区域,高达~ 4 Td。

英文摘要:

We use matrix models to characterize deconfinement at a nonzero temperature T for an SU(2) gauge theory in three spacetime dimensions. At one loop order, the potential for a constant vector potential A0 is ~T^3 times a trilogarithm function of A0/T. In addition, we add various nonperturbative terms to model deconfinement. The parameters of the model are adjusted by fitting the lattice results for the pressure. The nonperturbative terms are dominated by a constant term ~T^2Td, where Td is the temperature for deconfinement. Besides this constant, we add terms which are nontrivial functions of A0/T, both ~T^2Td and ~TTd^2. There is only a mild sensitivity to the details of these nonconstant terms. Overall we find a good agreement with the lattice results. For the pressure, the conformal anomaly, and the Polyakov loop the nonconstant terms are relevant only in a narrow region below ~1.2Td. We also compute the 't Hooft loop, and find that the details of the nonconstant terms enter in a much wider region, up to ~4Td.

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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