Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-04-25
Phys.Lett. B527 (2002) 92-98
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, LaTeX, 1 table, 4 eps figures included using epsfig; final version, comments and explanations extended, references a
Scientific paper
10.1016/S0370-2693(02)01183-8
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 $p_T$-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.
Armesto Nestor
Pajares Carlos
Sousa D.
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