Nuclear Seminar Announcement Prof. Ramona Vogt UC Davis " Open and Hidden Charm Production in Heavy Ion Collisions" Date: Wednesday, January 19, 2005 Time: 4:10 pm 416 Physics Abstract: We discuss aspects of open and hidden charm production in hadron-nucleus collisions at heavy ion colliders. The hadron nucleus results should be free of the effects of deconfinement and thus give a clear picture of heavy flavor production in cold nuclear matter. We first discuss the extraction of the total charm cross section in lower energy collisions, and compare this data would clarify the picture of charm production at collider energies, and compare it to next-to-leading order quantum chromodynamics calculations. We then describe calculations of the charm quark and hadron transverse momentum distributions and their agreement with the shape of the measured STAR transverse momentum distributions. We next explain how shadowing and moderate nuclear absorption can explain the PHENIX $J/\psi$ dAu/$pp$ ratios. We also present predictions of these effects in d+Pb collisions at the LHC. In this context, we also describe some of the unique capabilities of the LHC for heavy ion physics.

E-Mail: rlvogt@lbl.gov
Web Page: www.ucdavis.edu/