Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase

Journal Article

We discuss hadron production in heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC). We argue that hadrons at transverse momenta P T<5 GeV are formed by recombination of partons from the dense parton phase created in central collisions at RHIC. We provide a theoretical description of the recombination process for PT>2 GeV. Below PT=2 GeV our results smoothly match a purely statistical description. At high transverse momentum hadron production is well described in the language of perturbative QCD by the fragmentation of partons. We give numerical results for a variety of hadron spectra, ratios, and nuclear suppression factors. We also discuss the anisotropic flow v2 and give results based on a flow in the parton phase. Our results are consistent with the existence of a parton phase at RHIC hadronizing at a temperature of 175 MeV and a radial flow velocity of 0.55c.

Duke Authors

Cited Authors

  • Fries, RJ; Müller, B; Nonaka, C; Bass, SA

Published Date

  • 2003

Published In

  • Physical Review C Nuclear Physics

Volume / Issue

  • 68 / 4

Start / End Page

  • 449021 - 4490223