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Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 6: Physik mit schweren Ionen

HK 6.2: Talk

Monday, March 10, 2008, 14:30–14:45, 2E

Energy, Rapidity and Transverse Momentum Dependence of Multiplicity Fluctuations in CENTRAL Heavy Ion Collisions at CERN SPSHans Beck1, Julian Book1, Christoph Blume1, Peter Dinkelaker1, Volker Friese2, Marek Gazdzicki1, Claudia Höhne2, Dmytro Kresan2, •Benjamin Lungwitz1, Michael Mitrovski1, Rainer Renfordt1, Tim Schuster1, Reinhard Stock1, Claudia Strabel1, Herbert Ströbele1,2, Milica Utvic1, and Alexander Wetzler1 for the NA49 collaboration — 1Fachbereich Physik der Universität Frankfurt — 2Gesellschaft für Schwerionenforschung (GSI), Darmstadt

Multiplicity fluctuations are predicted to have a maximum in a hadronic medium which is close to the critical point and to the deconfinement phase transition. The energy, rapidity and transverse momentum dependence of multiplicity fluctuations were studied for central Pb + Pb collisions at 20A, 30A, 40A, 80A and 158A GeV as well as for central C+C and Si+Si collisions at 158A GeV by the NA49 experiment at the CERN SPS. The experimentally determined multiplicity fluctuations are compared to predictions of a hadron-gas and of string-hadronic models.

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