May 22 – 28, 2011
Centre Bonlieu
Europe/Zurich timezone

Constraining Cold Nuclear Matter Effects on $J/\psi$ production in Au +Au Collisions

Not scheduled
Théâtre National (Centre Bonlieu)

Théâtre National

Centre Bonlieu

Board: 77
Poster Heavy flavor and quarkonia production


Darren McGlinchey (Florida State University)


Recent results from PHENIX on $J/\psi$ production in d+Au collisions have shown that $J/\psi$'s are significantly suppressed at forward rapidity. This has interesting implications for $J/\psi$ suppression in Au+Au collisions, and may provide an answer to the $J/\psi$ puzzle. We try to constrain these cold nuclear matter (CNM) effects by fitting the EPS09 parametrization plus a break-up cross section to the PHENIX data in each rapidity range. In contrast to previous work, a stronger than linear dependence of initial-state shadowing on the nuclear thickness is employed to better fit the d+Au data. We extrapolate our results to predict the CNM effects on $J/\psi$ production in Au+Au collisions and compare with the PHENIX results. We find that some $J/\psi$ suppression remains in central collisions after factoring out the CNM effects and that the forward and midrapidity data are now in agreement within uncertainties.

Primary author

Darren McGlinchey (Florida State University)


Anthony Frawley (Florida State University)

Presentation materials