2022/12/11 by Csaba Török, Török, Csaba, Marco Cè +9 · 1 citation
Computer Science · Physics and Astronomy · #Advanced X-ray Imaging Techniques #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Gaussian Processes and Bayesian Inference #High Energy Physics - Lattice (hep-lat)
paper · pdf · doi:10.48550/arxiv.2212.05622
openalex publication_date 2022/12/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
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.