Lambda(1520) production at SPS and RHIC energies

Abstract

The recent preliminary results from central Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=$ 130 GeV from the STAR experiment at RHIC are presented and discussed along with the results on the $\Lambda$(1520) production in cental Pb+Pb and p+p collisions at $\sqrt{s}=$ 17 GeV from the NA49 experiment at the SPS. The $\Lambda$(1520) is measured with the invariant mass reconstruction of the decay products in the hadronic channel (K${}^{-}$, p). The mean $\Lambda$(1520) multiplicity scaled by the number of participants decreases from p+p to Pb+Pb collisions at the same energy of $\sqrt{s}$ = 17 GeV. An upper limit estimate of the multiplicity from the first measurement at $\sqrt{s_{\mathrm{NN}}}=$ 130 GeV shows the same trend. Comparisons with model predictions provides an indication of possible medium effects on the resonance and their decay daughters.

7 pages, proceedings of Strange Quarks in Matter (SQM2001), Frankfurt, Germany

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• A comparison of statistical hadronization models
• Strangeness Report
• Statistical Hadronization probed by resonances
• Strangeness and Quark--Gluon Plasma
• Resonance Production in Heavy Ion Collisions: Suppression of $\Lambda (1520)$ and Enhancement of $\Sigma (1385)$