Estimating the thermal photon production rate using lattice QCD
Csaba T\"or\"ok, Marco C\`e, Tim Harris, Ardit Krasniqi, Harvey B., Meyer, Arianna Toniato
TL;DR
This paper estimates the thermal photon production rate in quark-gluon plasma using lattice QCD simulations, applying various fit models to spectral functions and comparing different correlator channels.
Contribution
It introduces a lattice QCD approach to determine photon emission rates by analyzing transverse vector correlators at finite temperature.
Findings
Spectral functions estimated with continuum extrapolation.
Comparison of transverse and longitudinal channel results.
Agreement with perturbative NLO calculations at high energies.
Abstract
We present results for the photon emission rate determined from the transverse channel vector correlator at fixed spatial momentum using two flavors of dynamical Wilson fermions at 250 MeV. We estimate the transverse channel spectral function using the continuum extrapolated correlator by applying various fit ans\"atze with a smooth matching to the NLO perturbative result. We confront our estimate based on this channel with the latest results of our collaboration based on the difference of the transverse and longitudinal channels.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · High-Energy Particle Collisions Research · Quantum Chromodynamics and Particle Interactions