Abstract
We present a lattice QCD calculation with two dynamical flavors of the isovector vector correlator in the high-temperature phase. We analyze the correlator in terms of the associated spectral function, for which we review the theoretical expectations. In our main analysis, we perform a fit for the difference of the thermal and vacuum spectral functions, and we use an exact sum rule that constrains this difference. We also perform a direct fit for the thermal spectral function, and obtain good agreement between the two analyses for frequencies below the two-pion threshold. Under the assumption that the spectral function is smooth in that region, we give an estimate of the electrical conductivity.
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ArXiv ePrint: 1212.4200
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Brandt, B.B., Francis, A., Meyer, H.B. et al. Thermal correlators in the ρ channel of two-flavor QCD. J. High Energ. Phys. 2013, 100 (2013). https://doi.org/10.1007/JHEP03(2013)100
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DOI: https://doi.org/10.1007/JHEP03(2013)100