φ,Ω,andρproduction from deconfined matter in relativistic heavy ion collisions

We investigate the production of the $\phi$ meson and the $\Omega$ baryon which interact relatively weakly with hot hadronic matter, their spectra thus reflecting the early stage of the heavy ion collisions. Our analysis shows that the hadronization temperature, $T_{\mathrm{had}},$ and the transverse flow, $v_T^0,$ of the initial deconfined phase are strongly correlated: $T_{\mathrm{had}}+a\cdot {(v}_T^0{)}^2=0.25\mathrm{}$ GeV, where $a=0.37\mathrm{}$ GeV in the Pb+Pb collision at $158A$ $\mathrm{GeV}/c.\mathrm{}$ When choosing appropriate initial values of $T_{\mathrm{had}}$ and $v_T^0$ from the temperature region $T_{\mathrm{had}}=175\mathrm{}\pm 15$ MeV, the measured $\rho$ meson spectra was reproduced surprisingly well by the MICOR model. We have found weak influence of final state hadronic interactions on the transverse hadron spectra at $m_T-m_i>0.3\mathrm{}\mathrm{GeV}.\mathrm{}$