Analysis of the first RHIC results in the String Fusion Model

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 $p_T$-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.

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

References in corpus (11)

• Hadron production in nuclear collisions at RHIC and high density QCD
• Centrality Dependence of Charged Particle Multiplicity in Au-Au Collisions at sqrt(s_NN)=130 GeV
• Multiplicity distribution and spectra of negatively charged hadrons in Au+Au collisions at sqrt(s_nn) = 130 GeV
• Charged-particle pseudorapidity density distributions from Au+Au collisions at sqrt(sNN)=130 GeV
• Measurement of the mid-rapidity transverse energy distribution from $\sqrt{s_{NN}}=130$ GeV Au+Au collisions at RHIC
• Mid-rapidity anti-proton to proton ratio from Au+Au collisions at $\sqrt{s_{NN}}=130$ GeV
• Rapidity dependence of antiproton to proton ratios in Au+Au collisions at sqrt{s_{NN}}=130 GeV
• Ratios of charged antiparticles to particles near mid-rapidity in Au+Au collisions at sqrt(s_NN) = 130 GeV
• Elliptic flow at collider energies and cascade string models: The role of hard processes and multi-Pomeron exchanges
• Centrality Dependence of Hadron Multiplicities in Nuclear Collisions in the Dual Parton Model
• Enhanced Minijet Production in $A-A$ Collisions from Gluons with Large Transverse Momenta

Cited by in corpus (17)

• Systematic Studies of the Centrality and sqrt(s_NN) Dependence of dE_T/deta and dN_ch/deta in Heavy Ion Collisions at Mid-rapidity
• Percolation of color sources and critical temperature
• Transverse momentum fluctuations and percolation of strings
• Forward-Backward Multiplicity Correlations in Au+Au Collisions at $\sqrt{s_{NN}}$ = 200 Gev
• The meaning behind observed $p_T$ regions at the LHC energies
• Multiplicity fluctuations in the string clustering approach
• Selected Experimental Results from Heavy Ion Collisions at LHC
• Universal behavior of baryons and mesons transverse momentum distributions in the framework of percolation of strings
• Centrality dependence of the multiplicity and transverse momentum distributions at RHIC and LHC and the percolation of strings
• Understanding the Particle Production Mechanism with Correlation Studies Using Long and Short Range Correlations
• STAR's measurement of Long-range forward-backward multiplicity correlations as the signature of "dense partonic matter" in the Heavy Ion collisions at $\sqrt{s_{NN}}=$200 GeV.}
• Genuine Three-Body Bose-Einstein Correlations and Percolation of Strings
• Strong color fields and heavy flavor production
• Centrality and $\sqrt{s_{NN}}Dependenceofthe$dE_{T}/dη$and$dN_{ch}/dη$ in Heavy Ion Collisions at Mid-Rapidity
• Fluctuations and Correlations in STAR
• Collective behavior in nuclear interactions and shower development
• Rapidity and centrality dependence in the percolating colour strings scenario