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 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.

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Author:Stéphane HausslerGND, Horst StöckerORCiDGND, Marcus BleicherORCiDGND
ArXiv Id:http://arxiv.org/abs/hep-ph/0507189
Parent Title (German):Physical Review C
Document Type:Preprint
Date of Publication (online):2005/07/15
Date of first Publication:2005/07/15
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/10/27
Page Number:4
Preprint, später in Physical Review C, 73.2006, 021901(R)
Institutes:Physik / Physik
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht