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.
An estimate for the thermal photon rate from lattice QCD
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abstract
We estimate the production rate of photons by the quark-gluon plasma in lattice QCD. We propose a new correlation function which provides better control over the systematic uncertainty in estimating the photon production rate at photon momenta in the range {\pi}T/2 to 2{\pi}T. The relevant Euclidean vector current correlation functions are computed with $N_{\mathrm f}$ = 2 Wilson clover fermions in the chirally-symmetric phase. In order to estimate the photon rate, an ill-posed problem for the vector-channel spectral function must be regularized. We use both a direct model for the spectral function and a model-independent estimate from the Backus-Gilbert method to give an estimate for the photon rate.
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The polarization of thermal dileptons emitted in high-energy heavy-ion collisions
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.