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arXiv 1206.0685hep-ph
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胶子和鬼传播子的Polyakov圈和QCD热力学

Polyakov loop and QCD thermodynamics from the gluon and ghost propagators

Kenji Fukushima, Kouji Kashiwa

摘要:

我们研究夸克解除禁闭的Polyakov圈使用有限温度格点模拟测量的朗道规范的非微扰传播计算的有效潜力。对于纯SU(3)Yang-Mills理论,在2粒子不可约形式中的首项下,在与经验值一致的临界温度下,得到的有效势呈现一级相变.我们还估计了热力学量,以确认与临界温度附近的晶格数据的定性协议。然后,我们应用我们的有效势的手征模型的研究和计算的序参量和热力学量。与纯Yang-Mills理论不同的是,热力学量对非微扰传播子的温度依赖性很敏感,而序参量的行为不太敏感,这意味着精确确定温度依赖传播子的重要性.

英文摘要:

We investigate quark deconfinement by calculating the effective potential of the Polyakov loop using the non-perturbative propagators in the Landau gauge measured in the finite-temperature lattice simulation. With the leading term in the 2-particle-irreducible formalism the resultant effective potential exhibits a first-order phase transitions for the pure SU(3) Yang-Mills theory at the critical temperature consistent with the empirical value. We also estimate the thermodynamic quantities to confirm qualitative agreement with the lattice data near the critical temperature. We then apply our effective potential to the chiral model study and calculate the order parameters and the thermodynamic quantities. Unlike the case in the pure Yang-Mills theory the thermodynamic quantities are sensitive to the temperature dependence of the non-perturbative propagators, while the behavior of the order parameters is less sensitive, which implies the importance of the precise determination of the temperature-dependent propagators.

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