Lambda(1520) production at SPS and RHIC energies
C. Markert
Abstract
The recent preliminary results from central Au+Au collisions at s NN = 130 GeV from the STAR experiment at RHIC are presented and discussed along with the results on the Λ(1520) production in cental Pb+Pb and p+p collisions at s = 17 GeV from the NA49 experiment at the SPS. The Λ(1520) is measured with the invariant mass reconstruction of the decay products in the hadronic channel (K-, p). The mean Λ(1520) multiplicity scaled by the number of participants decreases from p+p to Pb+Pb collisions at the same energy of s = 17 GeV. An upper limit estimate of the multiplicity from the first measurement at s 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.
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