Hadron production in nuclear collisions at RHIC and high density QCD

By D. Kharzeev, M. Nardi. 2000

512 citations recorded by the source corpus.

Abstract We analyze the first results on charged particle multiplicity at RHIC in the conventional eikonal approach and in the framework of high-density QCD. We extract the fraction F of the hadron multiplicity originating from “hard” (i.e., proportional to the number of binary collisions) processes; we find a strong growth of this fraction with energy: F( s =56  GeV )≃22% , while F( s =130  GeV )≃37% . This indicates a rapid increase in the density of the produced particles. We outline the predictions of high-density QCD for the centrality, energy, and atomic number dependence of hadron production. Surprisingly, the predictions of the conventional eikonal approach and of high-density QCD for centrality dependence of hadron multiplicity at s =130  GeV appear very similar.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/fbce3f78e00e1a6f7dd1124d8fc750bebafc6e1f

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In Nuclear and High Energy Physics

1. P. Braun-Munzinger
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3. J. Stachel
4. T. Schaefer
5. Huichao Song
6. K. Gajdošová
7. You Zhou
8. Chun Shen

Citations in the corpus

• Formation of dense partonic matter in relativistic nucleus–nucleus collisions at RHIC: Experimental evaluation by the PHENIX Collaboration (2004, background): ““HIJING” is a pQCD-based model [71], while “KLN” features gluon saturation in the initial state [72,73]; “EKRT” assumes saturation in the final state [74,75].”
• Collective flow and hydrodynamics in large and small systems at the LHC (2017, methodology): “The KLN model treats the degrees of freedom of the initial systems as gluons and calculates the initial density profiles from the kT factorization formula [103].”