1. Estimation of the photon production rate using imaginary momentum correlators
- Author
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Csaba Török, Marco Cè, Tim Harris, Ardit Krasniqi, Harvey Meyer, Samuel Ruhl, Török, C, Cè, M, Harris, T, Krasniqi, A, Meyer, H, and Ruhl, S
- Subjects
Computation theory ,Photons ,High Energy Physics - Lattice ,Laplace transform ,High Energy Physics - Lattice (hep-lat) ,Lattice theory ,FOS: Physical sciences - Abstract
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., Comment: 9 pages, 7 figures, contribution to the 39th International Symposium on Lattice Field Theory (LATTICE2022)
- Published
- 2023