Testing thermal photon and dilepton rates

A bstract 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 f = 2, at T ∼ 1 . 2 T c ). The perturbative side inco...

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Bibliographic Details
Published inThe journal of high energy physics Vol. 2019; no. 11; pp. 1 - 18
Main Authors Jackson, G., Laine, M.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2019
Springer Nature B.V
SpringerOpen
Subjects
Classical and Quantum Gravitation
Elementary Particles
High energy physics
Lattice QCD
Light
Perturbative QCD
Physics
Physics and Astronomy
Quantum chromodynamics
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quark-Gluon Plasma
Quarks
Regular Article - Theoretical Physics
Relativity Theory
Spectra
String Theory
Thermal Field Theory
Quark-Gluon Plasma
Lattice QCD
Perturbative QCD
Thermal Field Theory
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Summary:A bstract 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 f = 2, at T ∼ 1 . 2 T 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 α 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.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP11(2019)144