The electrical conductivity and soft photon emissivity of the QCD plasma

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  • 9 January 2003
Abstract
The electrical conductivity in the hot phase of the QCD plasma is extracted from a quenched lattice measurement of the Euclidean time vector correlator for 1.5 < T/T_c < 3. The spectral density in the vicinity of the origin is analysed using a method specially adapted to this region, and a peak at small energies is seen. The vector susceptibility is then used to extract the electrical conductivity and make a continuum extrapolation. This allows us to predict the soft photon emissivity of the QCD plasma.

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