Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 2: Heavy Ion Reactions I, Ultrarelativistic Energies

HK 2.3: Talk

Monday, March 16, 1998, 14:45–15:00, P

Proton-Proton Correlations in Central Pb+Pb Collisions at 158 AGeV — •M. Cristinziani, F. Eckhardt, V. Friese, T. Henkel, C. Struck, and F. Pühlhofer — Fachbereich Physik der Universität Marburg^* and the NA49 Collaboration

Proton-proton correlations in central Pb+Pb collisions at 158 GeV/u were studied in order to determine to what extent they are sensitive to the radius of the freeze-out configuration. The large-volume TPCs of NA49 at the CERN-SPS combined with a high-resolution TOF detector permitted excellent proton identification at mid-rapidity.

The correlation function was obtained from data for 200,000 events. The combinatorial background was calculated using the event-mixing technique. Monte-Carlo simulations were carried out using the event-generator VENUS [1] and the correlation code CRAB [2]. After corrections for momentum resolution and Λ feed-down, simulations and data are consistent within experimental errors.

[1] K. Werner, Phys. Rep. 232, 87 (1993)

[2] S. Pratt et al., Nucl. Phys. A566, 103c (1994)

* supported by BMBF and GSI