We compute charmonium spectral functions in 2-flavor QCD on anisotropic lattices using the maximum entropy method. Our results suggest that the S-waves ($J/\psi$ and ${\eta }_c$) survive up to temperatures close to $2T_c$, while the P-waves (${\chi }_{c0}$ and ${\chi }_{c1}$) melt away below $1.2T_c$.

• Received 15 May 2007

DOI:https://doi.org/10.1103/PhysRevD.76.094513