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Baryon stopping probes deconfinement

  • Regular Article - Theoretical Physics
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Abstract.

Stopping and baryon transport in central relativistic Pb + Pb and Au + Au collisions are reconsidered with the aim to find indications for the transition from hadronic to partonic processes. At energies reached at the CERN Super Proton Synchrotron ( \( \sqrt{s_{NN}} = \) 6.3-17.3 GeV) and at RHIC (62.4 GeV) the fragmentation-peak positions as obtained from the data depend linearly on the beam rapidity and are in agreement with earlier 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 6-10GeV. In contrast, the mean rapidity loss is predicted to depend linearly on the beam rapidity only at high energies beyond the RHIC scale. The combination of both results offers a clue for the transition from hard partonic to soft hadronic processes in baryon stopping. NICA results could corroborate these findings.

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Authors and Affiliations

  1. Institut für Theoretische Physik der Universität Heidelberg, Philosophenweg 16, D-69120, Heidelberg, Germany

    Georg Wolschin

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  1. Georg Wolschin
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Correspondence to Georg Wolschin.

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Communicated by D. Blaschke

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Wolschin, G. Baryon stopping probes deconfinement. Eur. Phys. J. A 52, 238 (2016). https://doi.org/10.1140/epja/i2016-16238-3

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  • DOI: https://doi.org/10.1140/epja/i2016-16238-3

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