Heavy quarkonium in a holographic QCD model

Encouraged by recent developments in AdS/QCD models for light quark system, we study heavy quarkonium in the framework of the AdS/QCD models. We calculate the masses of $c\bar c$ vector meson states using the AdS/QCD models at zero and at finite temperature. Among the models adopted in this work, we find that the soft wall model most suitably describes the heavy quark states at zero temperature. At finite temperature, we observe that once the bound state is above $T_c$, its mass will increase with temperature until it dissociates at a temperature of around $494 {\rm MeV}$. The present model serves as a unified non perturbative model to investigate the properties of bound quarkonium states above $T_c$