Münster 2002 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 13: Poster Session: Heavy Ions
HK 13.7: Poster
Tuesday, March 12, 2002, 10:30–12:45, Foyer Chemie
Production of φ→ e+ e− in central Pb+Pb collisions at 158AGeV* — •Peter Dinkelaker1, L. Betev1, C. Blume2, R. Bramm1, P. Buncic1, M. Gaździcki1, T. Kollegger1, I. Kraus2, A. Mischke2, R. Renfordt1, A. Sandoval2, R. Stock1, H. Ströebele1, D. Vranic1, A. Wetzler1, and J. Zaranek1 — 1Institut für Kernphysik, Universität Frankfurt — 2Gesellschaft für Schwerionenforschung, Darmstadt
The first results on φ→ e+ e− production in central Pb+Pb collisions at 158 AGeV are presented. They are based on the NA49 data (3 million events) taken in the dedicated run in 2000. The obtained upper limit estimate for the φ yield is compared with the results for the hadronic decay channel φ→ K+ K− measured in NA49 and for the leptonic decay channel φ→ µ+ µ− measured in NA50. A review of models concerning φ production and possible differences between results obtained from leptonic and hadronic decay channels is given.
*supported by BMBF and GSI