2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/204425Multiplicity 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.presented at Critical Point and Onset of Deconfinement, 4th International Workshop, July 9-13 2007, GSI Darmstadt, Germany, updated version including referee commentsNuclear Experimenttext