Hydrodynamical analysis of hadronic spectra in the 130 GeV/nucleon Au+Au collisions

We study one-particle spectra and a two-particle correlation function in the 130 GeV/nucleon Au+Au collisions at the Relativistic Heavy Ion Collider by making use of a hydrodynamical model. We calculate the one-particle hadronic spectra and present an analysis of Bose-Einstein correlation functions based on a numerical solution of the hydrodynamical equations which takes both longitudinal and transverse expansion into account appropriately. The hydrodynamical model provides excellent agreement with the experimental data in the pseudorapidity and the transverse momentum spectra of charged hadrons, the rapidity dependence of the antiproton-to-proton ratio, and almost consistent results for the pion Bose-Einstein correlation functions. Our numerical solution with a simple freeze-out picture suggests the formation of a quark-gluon plasma with large volume and low net-baryon density.