The thermal photon emissivity at the QCD chiral crossover from imaginary momentum correlators
Year: 2024
Type: conference-paper
Abstract: The thermal photon emissivity at the QCD chiral crossover is investigated using imaginary momentum correlators. These have been measured on a newly generated 20 × 963 lattice-QCD ensemble with O(a)-improved Wilson quarks and physical up, down and strange quark masses at a temperature T = 154 MeV near the pseudo-critical temperature. In order to realize the photon on-shell condition, the spatially transverse Euclidean correlators have to be evaluated at imaginary spatial momenta. Employing a bounding method, we present a preliminary result on the quantity HE(ω1), which corresponds to an energy-moment of the photon spectral function σ(ω)/ω defined by the weight function 1/(ω2 + ω2n), the ωn being integer multiples of 2πT.
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6947505710
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