English

Analysis of the first RHIC results in the String Fusion Model

High Energy Physics - Phenomenology 2009-11-07 v2 Nuclear Theory

Abstract

First results from RHIC on charged multiplicities, evolution of multiplicities with centrality, particle ratios and transverse momentum distributions in central and minimum bias collisions, are analyzed in a string model which includes hard collisions, collectivity in the initial state considered as string fusion, and rescattering of the produced secondaries. Multiplicities and their evolution with centrality are successfully reproduced. Transverse momentum distributions in the model show a larger pTp_T-tail than experimental data, disagreement which grows with increasing centrality. Discrepancies with particle ratios appear and are examined comparing with previous features of the model at SPS.

Keywords

Cite

@article{arxiv.hep-ph/0104269,
  title  = {Analysis of the first RHIC results in the String Fusion Model},
  author = {N. Armesto and C. Pajares and D. Sousa},
  journal= {arXiv preprint arXiv:hep-ph/0104269},
  year   = {2009}
}

Comments

17 pages, LaTeX, 1 table, 4 eps figures included using epsfig; final version, comments and explanations extended, references added and updated, Fig. 1 enlarged, results and conclusions unchanged