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Rapidity equilibration in d + Au and Au + Au systems

  • Quark-Gluon-Plasma Thermalization
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Abstract.

In a Relativistic Diffusion Model (RDM), the evolution of net-proton rapidity spectra with \( \sqrt{{s_{NN}}}\) in heavy systems is proposed as an indicator for local equilibration and longitudinal expansion. The broad midrapidity valley recently discovered at RHIC in central Au + Au collisions at \( \sqrt{{s_{NN}}}\) = 200 GeV suggests rapid local equilibration which is most likely due to deconfinement, and fast longitudinal expansion. Rapidity spectra of produced charged hadrons in d + Au and Au + Au systems at RHIC energies and their centrality dependence are well described in a three-sources RDM. In central collisions, about 19% of the produced particles are in the equilibrated midrapidity region for d + Au.

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

    G. Wolschin

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  1. G. Wolschin
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Wolschin, G. Rapidity equilibration in d + Au and Au + Au systems. Eur. Phys. J. A 29, 113–118 (2006). https://doi.org/10.1140/epja/i2005-10308-7

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  • DOI: https://doi.org/10.1140/epja/i2005-10308-7

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