Hadronic spectral functions below and above the QCD phase transition

We extract the spectral functions in the scalar, pseudo-scalar, vector, and axial-vector channels above the deconfinement phase transition temperature (Tc) using the maximum entropy method (MEM). We use anisotropic lattices, 323 x 32, 40, 46, 54, 72, 80, and 96 (corresponding to T = 2.3Tc → 0.8Tc), with the renormalized anisotropy ξ = 4.0 to have enough temporal data points to carry out the MEM analysis. Our result suggests that the spectral functions continue to possess non-trivial structures even above Tc and in addition that there is a qualitative change in the state of the deconfined matter between 1.5Tc and 2Tc. (author)