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 SPS — Hans 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 Ströbele^1,2, 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.