Thermal spectra can be produced by certain classes of emission kernels without probe thermalization, as when the differential cross section depends on angle but not on the Mandelstam variable s, providing a kernel-based criterion to distinguish genuine equilibrium from kernel artifacts.
David, Direct real photons in relativistic heavy ion collisions, Rept
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Models chemical non-equilibrium in finite-density QGP under conformal Gubser flow and its impact on hard thermal photon production, finding delayed equilibration with quarks lagging gluons, suppressed total yield but enhanced early high-pT photons, and distinct temporal emission structure.
Relative-angle modes of pair correlations produce sign-changing modifications to the in-medium photon spectrum with magnitudes comparable to the factorized contribution.
Photon emission rate and electromagnetic energy loss from rescattering in magnetized QGP are derived in the high-energy limit, showing slight suppression over broad jet energies.
Uses blast-wave fits to pi, K, and p spectra plus measured K/pi to predict low-pT eta/pi0 ratio, finding eta-decay photon uncertainty of order 10% of direct-photon signal at pT~1 GeV/c in central Pb-Pb at 2.76 TeV.
citing papers explorer
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Thermal Spectra Without Detailed Balance
Thermal spectra can be produced by certain classes of emission kernels without probe thermalization, as when the differential cross section depends on angle but not on the Mandelstam variable s, providing a kernel-based criterion to distinguish genuine equilibrium from kernel artifacts.
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Finite-Density Dynamics of Chemically Equilibrating QGP in Conformal Gubser Flow and Hard Thermal Photon Production
Models chemical non-equilibrium in finite-density QGP under conformal Gubser flow and its impact on hard thermal photon production, finding delayed equilibration with quarks lagging gluons, suppressed total yield but enhanced early high-pT photons, and distinct temporal emission structure.
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Probing Pair Correlations in QCD Matter with Photon Spectra
Relative-angle modes of pair correlations produce sign-changing modifications to the in-medium photon spectrum with magnitudes comparable to the factorized contribution.
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Photon radiation induced by rescattering in strong-interacting medium with a magnetic field
Photon emission rate and electromagnetic energy loss from rescattering in magnetized QGP are derived in the high-energy limit, showing slight suppression over broad jet energies.
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Constraining the Low-$p_T$ $\eta/\pi^0$ Ratio for Direct-Photon Analyses with Blast-Wave Fits to $\pi$, $K$, and $p$ Spectra
Uses blast-wave fits to pi, K, and p spectra plus measured K/pi to predict low-pT eta/pi0 ratio, finding eta-decay photon uncertainty of order 10% of direct-photon signal at pT~1 GeV/c in central Pb-Pb at 2.76 TeV.