Transverse flow and hadrochemistry inAu+Aucollisions atsNN=200GeV

We present a hydrodynamic assessment of preliminary particle spectra observed in $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{s_{\mathrm{NN}}}=200\mathrm{}\mathrm{GeV}.$ The hadronic part of the underlying equation of state is based on explicit conservation of (measured) particle ratios throughout the resonance gas stage after chemical freezeout by employing chemical potentials for stable mesons, nucleons, and antinucleons. We find that under these conditions the data (in particular, the proton spectra) favor a low freezeout temperature of around $\sim 100\mathrm{MeV}.$ Furthermore, we show that through inclusion of a moderate prehydrodynamic transverse flow field the shape of the spectra improves with respect to the data. The effect of the initial transverse boost on elliptic flow and the freezeout geometry of the system is also discussed.