论文标题
热皮质的电导率
Electric conductivity of hot pion matter
论文作者
论文摘要
运输系数的确定在表征热和密集的核物质方面起着核心作用。当前，在热习惯物质的电导率的各种计算之间存在很大的差异。在目前的工作中，我们通过从电磁光谱函数中提取热旋旋物质的电导率，该功能通过其消失的3-Momentum在矢量优势模型（VDM）内通过其零能量限制。由于在VDM中，光子伴侣主要通过$ρ$ erson进入耐药电流，因此，我们使用Hadronic多体理论来计算$ρ$ -Meson在热胎中的自我能源，通过将其乳头云与热$π$ - $ρ$和$π$ - $π$ fo loops（包括Vertex orpack）保持在热旋转中。特别是，我们分析了光谱函数的低能运输峰，用温度提取其行为，并与文献中现有方法（结果）进行比较。
The determination of transport coefficients plays a central role in characterizing hot and dense nuclear matter. Currently, there are significant discrepancies between various calculations of the electric conductivity of hot hadronic matter. In the present work we calculate the electric conductivity of hot pion matter by extracting it from the electromagnetic spectral function, via its zero energy limit at vanishing 3-momentum, within the Vector Dominance Model (VDM). Since within the VDM the photon couples to the hadronic currents primarily through the $ρ$ meson, we use hadronic many-body theory to calculate the $ρ$-meson's self-energy in hot pion matter, by dressing its pion cloud with thermal $π$-$ρ$ and $π$-$σ$ loops including vertex corrections to maintain gauge invariance. In particular, we analyze the low-energy transport peak of the spectral function, extract its behavior with temperature and compare to (the results of) existing approaches in the literature.
