Hadron production in heavy ion collisions:: Fragmentation and recombination from a dense parton phase -: art. no. 044902

被引：562

作者：

Fries, RJ ^{[1
]}

Müller, B

Nonaka, C

Bass, SA

机构：

[1] Duke Univ, Dept Phys, Durham, NC 27708 USA

[2] Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW C | 2003年 / 68卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.68.044902

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

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 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.

引用

页码：449021 / 4490223

页数：23

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