We show that the baryon stopping observed in heavy ion collisions both at CERN-SPS and at RHIC can be derived from the one observed in protonproton collisions. No increase in the size of the baryon junction component is required between small size (pp) and large size (AA) systems. LPT Orsay 02-43 May 2002 Unité Mixte de Recherche UMR n◦ 8627 CNRS A huge baryon stopping has been observed in cent...

The production of K mesons in proton-nucleus collisions from 1.0 to 2.5 GeV is analyzed with respect to one-step nucleon-nucleon (NN → NYK) and two-step ∆-nucleon (∆N → KY N) or pion-nucleon (πN → KY ) production channels on the basis of a coupled-channel transport approach (CBUU) including the kaon final state interactions. The influence of momentum-dependent potentials for the nucleon, hypero...

We investigate whether the Affleck-Dine mechanism can produce sufficient baryon number of the universe in the gauge-mediated SUSY breaking models, while evading the cosmological moduli problem by late-time entropy production. We find that the Q-ball formation makes the scenario difficult, irrespective of the detail mechanism of the entropy production.