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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. Zaranek2 — 1GSI 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