## Event-by-event analysis of baryon-strangeness correlations : pinning down the critical temperature and volume of QGP formation

The recently proposed baryon-strangeness correlation (C_BS) is studied with a string-hadronic transport model (UrQMD) for various energies from E_lab=4 AGeV to \sqrt s=200 AGeV. It is shown that rescattering among second
The recently proposed baryon-strangeness correlation (C_BS) is studied with a string-hadronic transport model (UrQMD) for various energies from E_lab=4 AGeV to \sqrt s=200 AGeV. It is shown that rescattering among secondaries can not mimic the predicted correlation pattern expected for a Quark-Gluon-Plasma. However, we find a strong increase of the C_BS correlation function with decreasing collision energy both for pp and Au+Au/Pb+Pb reactions. For Au+Au reactions at the top RHIC energy (\sqrt s=200 AGeV), the C_BS correlation is constant for all centralities and compatible with the pp result. With increasing width of the rapidity window, C_BS follows roughly the shape of the baryon rapidity distribution. We suggest to study the energy and centrality dependence of C_BS which allow to gain information on the onset of the deconfinement transition in temperature and volume.

Author: Stephane Häussler, Horst Stöcker, Marcus Bleicher urn:nbn:de:hebis:30-19740 http://arxiv.org/abs/hep-ph/0507189 Preprint English 2005/10/27 2005 Univ.-Bibliothek Frankfurt am Main 2005/10/27 190629320 Physik Frankfurt Institute for Advanced Studies (FIAS) 530 Physik Universitätspublikationen Veröffentlichungsvertrag für Publikationen

$Rev: 11761$