Carlos Andres Peña Castañeda

Matsui formula and anomalous charmonium suppression in hot medium

I will show that a formula for charmonium suppression obtained by Matsui in 1989 can be applied to describe J/psi suppression in heavy-ion collisions at CERN-SPS and RHIC. Last results for two different c-cbar time evolutions will be presented: (1) A time-dependent harmonic oscillator, (2) A QQbar in a hot medium of photons and fermions.