Stopping in central Pb+Pb collisions at SPS energies and beyond
Departamento de Física de Partículas and IGFAE, Universidade de Santiago de Compostela Santiago de Compostela, Spain, EU
2 Institut für Theoretische Physik der Universität Heidelberg - Philosophenweg 16, D-69120 Heidelberg, Germany, EU
Accepted: 29 April 2011
We investigate stopping and baryon transport in central relativistic Pb+Pb and Au+Au collisions. At energies reached at the CERN Super Proton Synchrotron ( = 6.3–17.3 GeV) and at RHIC (62.4 GeV), we determine the fragmentation peak positions from the data. The resulting linear growth of the peak positions with beam rapidity is in agreement with our results from a QCD-based approach that accounts for gluon saturation. No discontinuities in the net-proton fragmentation peak positions occur in the expected transition region from partons to hadrons at 6–10 GeV.
PACS: 25.75.-q – Relativistic heavy-ion collisions / 24.85.+p – Quarks, gluons, and QCD in nuclear reactions / 25.75.Nq – Quark deconfinement, quark-gluon plasma production, and phase transitions
© EPLA, 2011