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Lattice constraints on the thermal photon rate

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arxiv 1604.07544 v2 pith:RBPZRXJX submitted 2016-04-26 hep-lat hep-ph

J. Ghiglieri , O. Kaczmarek , M. Laine , F. Meyer This is my paper · ORCID
classification hep-lathep-ph
keywords photonrateinvariantinterpolationlargelatticemassesprediction
verification ladder T0 review T1 audit T2 compute T3 formal
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We estimate the photon production rate from an SU(3) plasma at temperatures of about 1.1Tc and 1.3Tc. Lattice results for the vector current correlator at spatial momenta k ~ (2-6)T are extrapolated to the continuum limit and analyzed with the help of a polynomial interpolation for the corresponding spectral function, which vanishes at zero frequency and matches to high-precision perturbative results at large invariant masses. For small invariant masses the interpolation is compared with the NLO weak-coupling result, hydrodynamics, and a holographic model. At vanishing invariant mass we extract the photon rate which for k \gsim 3T is found to be close to the NLO weak-coupling prediction. For k \lsim 2T uncertainties remain large but the photon rate is likely to fall below the NLO prediction, in accordance with the onset of a strongly interacting behaviour characteristic of the hydrodynamic regime.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Thermal dilepton polarization and dynamics of the QCD plasma in relativistic heavy-ion collisions

    nucl-th 2024-12 conditional novelty 7.0 of 10

    Using next-to-leading-order rates, the paper predicts that dilepton polarization changes sign and magnitude in low and intermediate invariant-mass ranges, making it a sensitive probe of gluonic processes and pre-equil...

  2. The polarization of thermal dileptons emitted in high-energy heavy-ion collisions

    nucl-th 2026-05 unverdicted novelty 5.0 of 10

    Thermal dilepton polarization in LHC heavy-ion collisions is sensitive to QGP in-medium properties, with a one-to-one mapping derived between dielectron and dimuon channels.

  3. Energy and momentum dependence of the soft-axion interaction rate

    hep-ph 2026-01 unverdicted novelty 5.0 of 10

    HTL computation of soft axion rates shows interpolation between k=0 and k≈ω, raising ΔN_eff from ~0.03 to ~0.04 for light QCD axions at fa=4×10^8 GeV.

  4. The spectral reconstruction problem for thermal photon and dilepton rates

    hep-ph 2025-08 unverdicted novelty 2.0 of 10

    A proceedings review presents an improved estimator (lambda = 2) and new lattice QCD estimates for the thermal photon production rate from quark-gluon plasma.

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