Carlos Pena

Quantum harmonic oscillator model for J/psi suppression in SPS and RHIC

In this work we consider a quantum-mechanical model for the evolution of the charmonium state in a partially deconfined medium. We use a harmonic oscillator potential with complex oscillator frequency representing screening and absorption effects. Applying this model to J/psi production in heavy-ion collisions at CERN-SPS and RHIC we show that such a model can give a description of the behavior of the measured J/psi yield over the expected Cold Nuclear Matter effects RAA=RCNM, as a function of the charged particle number per pseudo-rapidity in the central rapidity region.