Tübingen 2003 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 33: Physik mit schweren Ionen III
HK 33.7: Vortrag
Mittwoch, 19. März 2003, 15:45–16:00, E
Event-by-Event charge fluctuations at 30, 40, 80 and 160 AGeV — •J. Zaranek1, C. Alt1, C. Blume2, P. Buncic1, P. Dinkelaker1, V. Friese2,3, M. Gazdzicki1, S. Kniege1, I. Kraus2, C. Meurer1, A. Mischke2, M. Mitrovski1, R. Renfordt1, A. Sandoval2, R. Stock1, H. Str"obele1, and I.K. Yoo2,3 — 1Institut f"ur Kernphysik, Universit"at Frankfurt — 2Gesellschaft f"ur Schwerionenforschung (GSI) — 3Fachbereich Physik der Universit"at Marburg
Study of event-by-event fluctations of electric charge in high energy nucleus-nucleus collisions may provide information on the state of matter in an early stage of the collision. They should be also sensitive to the number of resonances at chamical freez-out. Experimental data obtaind by NA49 on charge fluctuations in central Pb+Pb collisions at 30, 40, 80 and 158 AGeV will be shown. The results will be discussed in the framework of several models in which the effects of global charge conservation, resonances decay kinematics and QGP formation are studied.