论文标题
QCD在FRG方法中的有限温度和密度下：概述
QCD at finite temperature and density within the fRG approach: An overview
论文作者
论文摘要
在本文中，我们介绍了在有限温度和功能重新归一化组（FRG）方法中QCD研究最新进展的概述。 FRG是一种非驱动性连续性场方法，其中量子，热和密度波动连续地集成了重新归一化组（RG）尺度的演变。 QCD相结构的FRG结果和临界终点（CEP）的位置，状态的QCD方程（EOS），磁性EOS，Baryon数量波动与最近的实验测量，各种临界指数，临界区域的光谱功能，关键区域，动力学关键指数等。 FRG和Dyson-Schwinger方程中第一原则QCD计算的CEP位置的最新估计值通过小型Baryon化学势的晶格基准测试，在大约600 MEV的Baryon Chemical潜能的一个相当小的区域中收敛。通过$μ_b\ gtrsim 420 $ MEV发现了由负波函数重新规定指示的不均匀不稳定性区域。发现净 - 蛋白质数分布在实验中观察到的光束碰撞能量的峰度的非单调依赖性可能是由于低碰撞能量的越来越尖锐的交叉引起的。
In this paper we present an overview on recent progress in studies of QCD at finite temperature and densities within the functional renormalization group (fRG) approach. The fRG is a nonperturbative continuum field approach, in which quantum, thermal and density fluctuations are integrated in successively with the evolution of the renormalization group (RG) scale. The fRG results for the QCD phase structure and the location of the critical end point (CEP), the QCD equation of state (EoS), the magnetic EoS, baryon number fluctuations confronted with recent experimental measurements, various critical exponents, spectral functions in the critical region, the dynamical critical exponent, etc., are presented. Recent estimates of the location of the CEP from first-principle QCD calculations within fRG and Dyson-Schwinger Equations, which passes through lattice benchmark tests at small baryon chemical potentials, converge in a rather small region at baryon chemical potentials of about 600 MeV. A region of inhomogeneous instability indicated by a negative wave function renormalization is found with $μ_B\gtrsim 420$ MeV. It is found that the non-monotonic dependence of the kurtosis of the net-proton number distributions on the beam collision energy observed in experiments, could arise from the increasingly sharp crossover in the regime of low collision energy.
