Deuteron elastic scattering and stripping processes offC12as a three-body problem

Power laws in elementary and heavy-ion collisions

“…In Figs. 10 and 11 we show what can be extracted from P bP b collision data taken by NA49 experiment [55]. As one can observe the data confirm our expectation that dependencies of V ar(N )/ N and N on the number of participants N p are, after introducing the concept of T ef f , essentially the same.…”

“…They exhibit non-monotonic changes as function of the number of participants N p [55]. Actually, also changes of N show nonlinear increase, though not so spectacular.…”

“…Finally, let us discuss results on fluctuations of multiplicity observed in heavy-ion collisions [55]. They exhibit non-monotonic changes as function of the number of participants N p [55].…”

“…7. We close this part by noticing that this problem is not trivial since none of the known models for multiparticle production processes describes V ar(N )/ N vs N p observed experimentally [55]. They are described only by some specialized models addressing fluctuations, like the percolation model [56], the model assuming inter-particle correlations caused by the combination of strong and electromagnetic interactions [57] or the transparency, mixing and reflection model [58].…”

Phase transition signature results from PHENIX

“…In all collision systems, the minimum scaled variance occurs in the most central collisions and then begins to increase as the centrality decreases. A similar centrality-dependent trend of the scaled variance has also been observed at the SPS in low energy Pb+Pb collisions at √ s NN =17.3 GeV, measured by experiment NA49 [8], where the hard scattering contribution is expected to be small. All of the data points are consistent with or below the participant superposition model estimate.…”