---
author:
- 'Nelson R. F. Braga'
- ', M. A. Martin Contreras'
- and Saulo Diles
title:  Holographic Picture of Heavy Vector Meson Melting 
---

 Introduction 
==============

The suggestion [@Matsui:1986dk] (see [@Satz:2005hx] for a review) that $J/\psi $ supression in heavy ion collisions could be a signature for the formation of quark gluon plasma gave rise to a continuous interest in the thermal behavior of charmonium states. In particular, it is of great interest to know what are the temperature ranges at which the heavy vector mesons states melt. By melting one means the thermal dissociation in the medium that corresponds to the disappearance of the particle peak in the spectral function.

AdS/QCD models are very useful tools for studying spectral properties of hadronic states. Such models, inspired in the AdS/CFT correspondence [@Maldacena:1997re; @Gubser:1998bc; @Witten:1998qj], assume the existence of an approximate duality between a field theory living in an anti-de Sitter background deformed by the introduction of a dimension-full parameter and a gauge theory where the parameter plays the role of an energy scale. One of the earliest formulations, the hard wall AdS/QCD model, appeared in refs. [@Polchinski:2001tt; @BoschiFilho:2002ta; @BoschiFilho:2002vd] and consists in placing a hard geometrical cutoff in 