${\Xi }^0(1530)$ Production in Heavy-Ion Collisions \linebreak and its Implications for $\Delta t_{therm-chem}$

Abstract

We present the first measurements of the transverse momentum spectra and mid-rapidity yields of the ${\Xi }^0(1530)$ multi-strange baryon resonance, from $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}=200$ GeV Au+Au collisions at RHIC from the STAR experiment. Ratios of the mid-rapidity yield of this long-lived ($c\tau =21$ fm) resonance to its non-resonance partner (the $\Xi$ baryon) are compared to predictions from thermal models and to the corresponding ratios for other resonances previously reported by STAR. Conclusions will be drawn about the implication of these measurements for the time between chemical and thermal freeze-out ($\Delta t_{therm-chem}$) and any observed deviations from the expected mass and width will be discussed.

arXiv comment5 pages, 3 figures, proceedings of the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (QM2006)

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Cited by in corpus (9)

• THERMUS -- A Thermal Model Package for ROOT
• Bulk Viscosity driven clusterization of quark-gluon plasma and early freeze-out in relativistic heavy-ion collisions
• Strangeness -2 and -3 Baryons in a Constituent Quark Model
• Parton Distributions at Hadronization from Bulk Dense Matter Produced at RHIC
• Will jets reduce the elliptic flow at LHC, while decays of resonances restore the constituent quark scaling?
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• Why the $a_1$ meson might be a difficult messenger for the restoration of chiral symmetry
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• Resonance Production in Heavy Ion Collisions: Suppression of $\Lambda (1520)$ and Enhancement of $\Sigma (1385)$