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Transverse Energy per Charged Particle and Freeze-Out Criteria in Heavy-Ion Collisions

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arxiv 0708.0914 v1 pith:EYPXU76S submitted 2007-08-07 hep-ph

classification hep-ph
keywords energybeamchargedcollisionsdependencefreeze-outparticletransverse
verification ladder T0 review T1 audit T2 compute T3 formal
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In relativistic nucleus-nucleus collisions the transverse energy per charged particle, E_T/N_ch, increases rapidly with beam energy and remains approximately constant at about 800 MeV for beam energies from SPS to RHIC. It is shown that the hadron resonance gas model describes the energy dependence, as well as the lack of centrality dependence, qualitatively. The values of E_T/N_ch are related to the chemical freeze-out criterium E/N about 1 GeV valid for primordial hadrons.

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  1. Model Comparisons of Transverse Energy and Charged-Particle Multiplicity in A+A Collisions at Midrapidity from $\sqrt{s_{NN}}$ $=$ 7.7 to 200~GeV

    nucl-ex 2025-06 conditional novelty 4.0 of 10

    A broad model-data comparison shows that PYTHIA, AMPT, HIJING, and SMASH all fail to reproduce PHENIX transverse energy and multiplicity at low beam energies and in peripheral collisions.

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