Multiplicity Distributions and Charged-neutral Fluctuations
Abstract
Results from the multiplicity distributions of inclusive photons and charged particles, scaling of particle multiplicities, event-by-event multiplicity fluctuations, and charged-neutral fluctuations in 158· A GeV Pb+Pb collisions are presented and discussed. A scaling of charged particle multiplicity as Npart1.07 0.05 and photons as Npart1.12 0.03 have been observed, indicating violation of naive wounded nucleon model. The analysis of localized charged-neutral fluctuation indicates a model-independent demonstration of non-statistical fluctuations in both charged particles and photons in limited azimuthal regions. However, no correlated charged-neutral fluctuations are observed.
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