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Dependence of hadron spectra on decoupling temperature and resonance contributions

K. J. Eskola, H. Niemi, P. V. Ruuskanen, S. S. Räsänen

hep-pharXiv:hep-ph/0206230

Abstract

Using equilibrium hydrodynamics with initial conditions for the energy and net baryon number densities from the perturbative QCD + saturation model, a good simultaneous description of the measured pion, kaon and (anti)proton spectra in central Au+Au collisions at s=130 AGeV is found with a single decoupling temperature =150...160 MeV. The interplay between the resonance content of the EoS and the development of the transverse flow leads to inverse slopes and <pT> of hadrons which increase with decreasing . The origin of this result is discussed.

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