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Münster 2002 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 33: Heavy Ions IV

HK 33.2: Talk

Wednesday, March 13, 2002, 14:15–14:30, E

Correlation Study of Strange Baryons in Pb+Pb Reactions at 158 AGeV* — •C. Blume1, L. Betev2, A. Billmeier2, R. Bramm2, P. Buncic2, P. Dinkelaker2, M. Gaździcki2, T. Kollegger2, I. Kraus1, C. Markert1, A. Mischke1, R. Renfordt2, A. Sandoval1, R. Stock2, H. Ströbele2, D. Vranić1, A. Wetzler2, and J. Zaranek21GSI Darmstadt — 2IKF Frankfurt

The large number of strange baryons produced in ultrarelativistic heavy ion collisions makes the study of their correlations feasible. Of special interest is the measurement of the correlation function of Λ pairs, since it can shed light on the nature of their mutual interaction. Since, on the other side, the interaction of Λs with protons is rather well known, the pΛ correlation function can be used to extract information on the spacial extent of the emitting source. Compared to the analysis of pp correlations this method has the advantage of avoiding the influence of the Coulomb interaction.
We will present preliminary results on ΛΛ and pΛ correlations in central Pb+Pb reactions at 158 AGeV. The measurements will be compared to theoretical caluclations and their implications will be discussed.
*Supported by BMBF und GSI

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