Strange baryon resonance production in $\sqrt{s_{NN}} = 200$ GeV $p+p$   and $Au+Au$ collisions
  We report the measurements of $\Sigma (1385)$ and $\Lambda (1520)$ production in $p+p$ and $Au+Au$ collisions at $\sqrt{s_{NN}} = 200$ GeV from the STAR collaboration. The yields and the $p_{T}$ spectra are presented and discussed in terms of chemical and thermal freeze-out conditions and compared to model predictions. Thermal and microscopic models do not adequately describe the yields of all the resonances produced in central $Au+Au$ collisions. Our results indicate that there may be a time-span between chemical and thermal freeze-out during which elastic hadronic interactions occur. 
The STAR collaboration: B.I. Abelev, M.M. Aggarwal, Z. Ahammed, J.   Amonett, B.D. Anderson, M. Anderson, D. Arkhipkin, G.S....