Particle ratios are an appropriate tool to study the characteristics of entropy production in heavy-ion collisions, as shown in Fig. 1. We investigate the impact parameter dependence of the S/A ratio (entropy S per net participating baryon A) by means of the Λ/p ratio and will find it a tool to distinguish between chemical equilibrium as assumed in hydrodynamics (here: the 3-fluid model [1]) an...

We show that critical opalescence, a clear signature of second-order phase transition in conventional matter, manifests itself as critical intermittency in QCD matter produced in experiments with nuclei. This behaviour is revealed in transverse momentum spectra as a pattern of power laws in factorial moments, to all orders, associated with baryon production. This phenomenon together with a simi...

Using a high statistics data sample recorded at p s M Z 0 , we present evidence for diierences in baryon production rates between quark and gluon jets. In particular we study 3-jet events, where one of the jets is identiied as a gluon, and determine the rates of production of K 0 S and .

We show that energetically favored meson-baryon fluctuations present in the light-cone wavefunction of a transversely polarized proton can account for the left-right asymmetries measured in inclusive meson production processes.

The amount of proton stopping in central Pb1Pb collisions from 20–160 A GeV as well as hyperon and antihyperon rapidity distributions are calculated within the UrQMD model in comparison to experimental data at 40, 80, and 160 A GeV taken recently from the NA49 collaboration. Furthermore, the amount of baryon stopping at 160A GeV for Pb1Pb collisions is studied as a function of centrality in com...

We show that critical opalescence, a clear signature of second-order phase transition in conventional matter, manifests itself as critical intermittency in QCD matter produced in experiments with nuclei. This behaviour is revealed in transverse momentum spectra as a pattern of power laws in factorial moments, to all orders, associated with baryon production. This phenomenon together with a simi...