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The resonance production of $\Delta$, K(892), $\Sigma$(1385), $\Lambda$(1520)and $\phi$ from elementary p+p and Au+Au collisions at $\sqrt{s_{\rm NN}} = $200 GeV from the STAR experiment at RHIC is presented. Yields and spectra arediscussed in terms of chemical and thermal freeze-out conditions. Thermalmodels do not describe sufficiently the yields of the resonance production incentral Au+Au collisions. The approach which includes pseudo-elastic andelastic hadronic interactions after chemical freeze-out until thermalfreeze-out suggests a time span of $\Delta \tau>$5 fm/c.Comment: 6 pages 4 figures, conference proceeding

What do We Learn from Resonance Production in Heavy Ion Collisions?