Dependence of hadron spectra on decoupling temperature and resonance contributions

Details Dependence of hadron spectra on decoupling temperature and resonance contributions Dependence of hadron spectra on decoupling temperature and resonance contributions

2002-06-24

arxiv.org/abs/hep-ph/0206230v2

Phys.Lett. B566 (2003) 187-192

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 eps-figures. Section 3 rewritten, table 1 and figure 1 redrawn, 2 references added

Scientific paper

10.1016/S0370-2693(03)00839-6

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 $\sqrt s=130 A$GeV is found with a single decoupling temperature $\Tdec=150...160$ MeV. The interplay between the resonance content of the EoS and the development of the transverse flow leads to inverse slopes and $$ of hadrons which increase with decreasing $\Tdec$. The origin of this result is discussed.

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