K⁻ AND $\overline p$ SPECTRA FOR Au+Au COLLISIONS AT $\sqrt s \, = \,200\,{\rm GeV}$ FROM STAR, PHENIX AND BRAHMS IN COMPARISON TO CORE-CORONA MODEL PREDICTIONS

Abstract

Based on results obtained with event generators we have launched the core-corona model. It describes in a simplified way but quite successfully the centrality dependence of multiplicity and < p t > of identified particles observed in heavy-ion reaction at beam energies between √ s = 17 GeV and 200 GeV. Also the centrality dependence of the elliptic flow, v 2 , for all charged and identified particles could be explained in this model. Here we extend this analysis and study the centrality dependence of single particle spectra of K − andp measured by the PHENIX, STAR and BRAHMS collaborations. We find that also for these particles the analysis of the spectra in the core-corona model suffers from differences in the data published by the different experimental groups, notably for the pp collisions. As for protons and K + for each