Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase
Abstract
We discuss hadron production in heavy ion collisions at 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 P_T > 2 GeV. Below P_T = 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 v_2 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.
Cite
@article{arxiv.nucl-th/0306027,
title = {Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase},
author = {R. J. Fries and B. Muller and C. Nonaka and S. A. Bass},
journal= {arXiv preprint arXiv:nucl-th/0306027},
year = {2008}
}
Comments
25 pages LaTeX, 18 figures; v2: some references updated; v3: some typos fixed