Open charm as a probe of pre-equilibrium dynamics in nuclear collisions?

Abstract

The pre-equilibrium contribution to open charm production in nuclear collisions at √ s = 200 AGeV is calculated using three different models for the correlations between momentum and space-time coordinates. Ideal (Bjorken) correlation between the rapidity y and space-time rapidity η of mini-jet gluons suppresses greatly the pre-equilibrium yield and even allowing for the minimal uncertainty correlations leads, in contrast to previous estimates, only to a small pre-equilibrium charm yield as compared to initial yield due to gluon fusion. The "intrinsic" charm process is negligible in the mid-rapidity domain.

QCD Back-Scattering Photons in Relativistic Heavy ion Collisions

“…Now the phase-space distribution of the quark jets f q (p) is related to their invariant yield as (Lin and Gyulassy, 1995):…”