Strange Baryon Resonance Production in sNN=200GeV p+p and Au+Au Collisions

B. I. Abelev et al. (STAR Collaboration)
Phys. Rev. Lett. 97, 132301 – Published 25 September 2006

Abstract

We report the measurements of Σ(1385) and Λ(1520) production in p+p and Au+Au collisions at sNN=200GeV from the STAR Collaboration. The yields and the pT 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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  • Received 27 April 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.132301

©2006 American Physical Society

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Vol. 97, Iss. 13 — 29 September 2006

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