Quarkonium correlators and spectral functions at zero and finite temperature

Abstract

We study quarkonium correlators and spectral functions at zero and finite temperature using the anisotropic Fermilab lattice formulation with anisotropy $\ensuremath{\xi}=2$ and 4. To control cut-off effects we use several different lattice spacings. The spectral functions were extracted from lattice correlators with maximum entropy method based on a new algorithm. We find evidence for the survival of $1S$ quarkonium states in the deconfined medium till relatively high temperatures as well as for dissolution of $1P$ quarkonium states right above the deconfinement temperature.