论文标题
在有限温度下对QCD的光谱特性的非扰动见解
Non-perturbative insights into the spectral properties of QCD at finite temperature
论文作者
论文摘要
在有限温度光谱函数下的量子场理论中，描述了粒子系统在存在热介质的情况下的行为。尽管原则上可以使用来自晶格模拟的数据来确定光谱函数特征，但现有方法依赖于从时间相关器中提取这些数量的方法，这需要一个人来避免一个错误的逆问题。在这些程序中，我们报告了一种最近的方法，该方法相反，该方法利用了现场位置施加的非扰动约束来直接从空间相关器中提取光谱函数信息。特别是，我们专注于这种方法在温度范围内的空间伪量表中的晶格QCD数据应用于$ 220-960 \，\ text {mev} $，并概述为什么此数据支持在pseude $ pseude $ texpe $ t pc} pt text $ t pc {
In quantum field theories at finite temperature spectral functions describe how particle systems behave in the presence of a thermal medium. Although data from lattice simulations can in principle be used to determine spectral function characteristics, existing methods rely on the extraction of these quantities from temporal correlators, which requires one to circumvent an ill-posed inverse problem. In these proceedings we report on a recent approach that instead utilises the non-perturbative constraints imposed by field locality to extract spectral function information directly from spatial correlators. In particular, we focus on the application of this approach to lattice QCD data of the spatial pseudo-scalar meson correlator in the temperature range $220-960 \, \text{MeV}$, and outline why this data supports the conclusion that there exists a distinct pion state above the chiral pseudo-critical temperature $T_{\!\text{pc}}$.
