Multiplicity fluctuations in the forward hemisphere were studied for positively, negatively and all charged hadrons produced in central Pb+Pb collisions at 20A, 30A, 40A, 80A and 158A GeV. The multiplicity distributions and their scaled variances are presented as a function of collision energy, rapidity and transverse momentum. The distributions have a bell-like shape and the scaled variance changes monotonously with energy in the range from 0.8 to 1.2. No indication of the critical point is observed. The string-hadronic model UrQMD reproduces results on the scaled variance. The predictions of the hadron-resonance gas model obtained within the grand-canonical and canonical ensembles for the scaled variance disagree with the data.
|Journal||Proceedings of Science|
|Publication status||Published - dec. 1 2007|
|Event||4th International Workshop on Critical Point and Onset of Deconfinement, CPOD 2007 - Darmstadt, Germany|
Duration: júl. 9 2007 → júl. 13 2007
ASJC Scopus subject areas