Charmonium correlators and spectral functions at finite temperature

Abstract

We present an operational approach to address the in-medium behavior of charmonium and analyze the reliability of maximum entropy method (MEM). We study the dependences of the ratio of correlators to the reconstructed one and the free one on the resonance's width and the continuum's threshold. Furthermore, we discuss the issue of the default model dependence of the spectral function obtained from MEM.

parallel talk given at Confinement8, Mainz, Germany, September 1 - 6, 2008