Köln 2004 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 21: Heavy Ions II

HK 21.3: Vortrag

Dienstag, 9. März 2004, 16:15–16:30, F

Two-particle correlations in Pb+Au collisions at 158 AGeV — •Dariusz Antończyk — Gesellschaft für Schwerionenforschung mbH, Darmstadt, Germany

CERES is a dilepton spectrometer at CERN SPS. After the upgrade, which improved the momentum resolution and extended the detector capabilities to hadrons, CERES collected 30 million Pb+Au events at 158 AGeV in the year 2000. A Hanbury-Brown-Twiss (HBT) analysis of pion pairs in a subset of these data, together with the results obtained at other beam energies, lead to a new freeze-out criterion (PRL 90 (2003) 022301). After the full calibration of the 30 million events was completed the dependence of the HBT correlation radii on the orientation of the reaction plane, the non-identical particle Coulomb correlations, and the strangeness production are under study. The current status of this analysis will be presented.