PUB - Publikationen an der Universität Bielefeld

We study the centrality dependence to be expected if only charmonium production in the corona survives in high-energy nuclear collisions, with full suppression in the hot, deconfined core. To eliminate cold nuclear matter effects as far as possible, we consider the ratio of charmonium to open charm production. The centrality dependence of this ratio is found to follow a universal geometric form, applicable to both the Large Hadron Collider (LHC) and the Relativistic Heavy-Ion Collider (RHIC) in collisions at both central and forward rapidities.