Testing thermal photon and dilepton rates

Abstract

We confront the thermal NLO vector spectral function (both the transverse and longitudinal channel with respect to spatial momentum, both above and below the light cone) with continuum-extrapolated lattice data (both quenched and with $N_{\mathrm{f}}=2$, at $T\sim 1.2T_{\mathrm{c}}$). The perturbative side incorporates new results, whose main features are summarized. The resolution of the lattice data is good enough to constrain the scale choice of ${\alpha }_{\mathrm{s}}$ on the perturbative side. The comparison supports the previous indication that the true spectral function falls below the resummed NLO one in a substantial frequency domain. Our results may help to scrutinize direct spectral reconstruction attempts from lattice QCD.

19 pages. v2: clarifications added

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Cited by in corpus (13)

• Perturbative Thermal QCD: Formalism and Applications
• Exploring the influence of bulk viscosity of QCD on dilepton tomography
• Two-loop thermal spectral functions with general kinematics
• Dilepton production at next-to-leading order and intermediate invariant-mass observables
• Virtual Photons Shed Light on the Early Temperature of Dense QCD Matter
• The rate of photon production in the quark-gluon plasma from lattice QCD
• Hard Thermal Loop -- theory and applications
• Smooth interpolation between thermal Born and LPM rates
• Lattice QCD estimates of thermal photon production from the QGP
• Shedding light on thermal photon and dilepton production
• Thermal dilepton production in collisional hot QCD medium in the presence of chromo-turbulent fields
• Thermal Field Theory in the Presence of a Background Magnetic Field and its Application to QCD
• Photon emissivity of the quark-gluon plasma: a lattice QCD analysis of the transverse channel