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Strange baryon resonance production in sqrt s NN=200 GeV p+p and Au+Au collisions
B I Abelev1, M M Aggarwal, Z Ahammed
1Yale University, New Haven, Connecticut 06520, USA.
Abstract:
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.
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