Speaker
Anthony Frawley
(Florda State University)
Description
The system size and multiplicity dependence of heavy quarkonia
production in heavy ion collisions can be used to disentangle the
effects of hot and cold nuclear matter on quarkonia production. In
particular, color screening and recombination, which modify the
yields of charmonia in the quark gluon plasma, can be studied in
large systems. We present PHENIX results on J/$\psi$ production in
U$+$U collisions. The yield is compared to that in Au$+$Au
collisions as a function of centrality. In peripheral to
midcentral collisions the ratio scales as $N_\mathrm{coll}$, but in
central collisions it scales as $N_\mathrm{coll}^2$. This is
consistent with a picture where, for more central collisions, the
coalescence mechanism for the production of the J/$\psi$ becomes
dominant over the decrease in yield due to the increased energy
density.
| On behalf of collaboration: | PHENIX |
|---|
Author
Anthony Frawley
(Florda State University)
