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arXiv 1101.5571hep-lathep-ph
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淬火格点量子色动力学中有限温度介子关联函数的连续外推

Continuum extrapolation of finite temperature meson correlation functions in quenched lattice QCD

Anthony Francis, Frithjof Karsch

摘要:

本文探讨了有限温度下介子关联函数的连续极限$a\rightarrow 0$。详细地说,我们分析有限体积和晶格截止效应的连续物理的可能后果。我们使用三叶草改进的威尔逊费米子作用量对淬火规范组态进行了计算。我们提出并讨论了在$T\simeq1.45T_c$的$0.01 fm \lsim a \lsim\ 0.031 fm$范围内的晶格间距对应的具有$N_σ=32,48,64,128$的各向同性$N_σ^3\times 16$晶格和具有$N_τ=16,24,32,48$的$128^3 \times N_τ$晶格的模拟。对矢量介子和赝标量介子进行了连续极限外推,并介绍了它们的大距离热矩展开。我们讨论了这种分析对计算该温度下QGP电导率的影响。

英文摘要:

We explore the continuum limit $a\rightarrow 0$ of meson correlation functions at finite temperature. In detail we analyze finite volume and lattice cut-off effects in view of possible consequences for continuum physics. We perform calculations on quenched gauge configurations using the clover improved Wilson fermion action. We present and discuss simulations on isotropic $N_σ^3\times 16$ lattices with $N_σ=32,48,64,128$ and $128^3 \times N_τ$ lattices with $N_τ=16,24,32,48$ corresponding to lattice spacings in the range of $0.01 fm \lsim a \lsim\ 0.031 fm$ at $T\simeq1.45T_c$. Continuum limit extrapolations of vector meson and pseudo scalar correlators are performed and their large distance expansion in terms of thermal moments is introduced. We discuss consequences of this analysis for the calculation of the electrical conductivity of the QGP at this temperature.

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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