论文标题
使用假想动量相关器对光子生产率的估计
Estimation of the photon production rate using imaginary momentum correlators
论文作者
论文摘要
热光子发射速率取决于电磁电流的空间横向，中等光谱功能。但是，使用欧几里得数据访问光谱函数是一个具有挑战性的问题，这是由于反转拉普拉斯变换的不良性质。在这项贡献中，我们提出了实施直接计算固定相关器分析延续的提议的第一个结果，该建议是在固定的，通过计算适当的欧几里得相关因子在假想的空间动量下消失了光子的虚拟性。我们在250 meV的温度下采用了两个动力学O（A）改良的Wilson Fermions。
The thermal photon emission rate is determined by the spatially transverse, in-medium spectral function of the electromagnetic current. Accessing the spectral function using Euclidean data is, however, a challenging problem due to the ill-posed nature of inverting the Laplace transform. In this contribution, we present the first results on implementing the proposal of directly computing the analytic continuation of the retarded correlator at fixed, vanishing virtuality of the photon via the calculation of the appropriate Euclidean correlator at imaginary spatial momentum. We employ two dynamical O(a)-improved Wilson fermions at a temperature of 250 MeV.
