Diffusion and local deconfinement in relativistic systems

The evolution of net-proton rapidity spectra with sNN is heavy relativistic systems is proposed as an indicator for local equilibration, longitudinal expansion, and deconfinement. Bell-shaped distributions in central collisions at AGS energies and double-humped nonequilibrium spectra at SPS ishow su...

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1. Verfasser: Wolschin, Georg (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 25 March 2005
In: Nuclear physics. A, Nuclear and hadronic physics
Year: 2005, Jahrgang: 752, Pages: 484-488
ISSN:1873-1554
DOI:10.1016/j.nuclphysa.2005.02.053
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1016/j.nuclphysa.2005.02.053
Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0375947405002046
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Verfasserangaben:Georg Wolschin

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520 |a The evolution of net-proton rapidity spectra with sNN is heavy relativistic systems is proposed as an indicator for local equilibration, longitudinal expansion, and deconfinement. Bell-shaped distributions in central collisions at AGS energies and double-humped nonequilibrium spectra at SPS ishow substantial collective expansion. The broad midrapidity valley appearing at RHIC indicates longitudinal collective expansion of a locally equilibrated subsystem. In central Au-Au collisions at sNN=200 GeV, fast local equilibration which is most likely due to deconfinement is estimated in a Relativistic Diffusion Model to occur for 14 per cent of the incoming baryons. 
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