Fluctuations of the net-proton number can be measured experimentally and
thus provide important information about the matter created during heavy
ion collisions. Especially, these quantities may give clues about the
conjectured QCD critical point. We discuss the beam-energy dependence of
ratios of first four cumulants of the net-proton number, obtained using
the phenomenologically motivated...
We discuss the fact that the measured multiplicity distributions, P(N), after closer inspection, exhibit some peculiarly enhanced void probability and oscillatory behavior of the corresponding modified combinants. Both of these features can shed new light on our uderstanding of the multipaerticle production processes, and both were so far basically neglected (or ignored) in the usual analysis of data.
