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Nonequilibrium models of relativistic heavy-ion collisions

  • To be published in J. Phys. G - Proceedings of SQM 2004 : We review the results from the various hydrodynamical and transport models on the collective flow observables from AGS to RHIC energies. A critical discussion of the present status of the CERN experiments on hadron collective flow is given. We emphasize the importance of the flow excitation function from 1 to 50 A.GeV: here the hydrodynamic model has predicted the collapse of the v2-flow ~ 10 A.GeV; at 40 A.GeV it has been recently observed by the NA49 collaboration. Since hadronic rescattering models predict much larger flow than observed at this energy we interpret this observation as evidence for a first order phase transition at high baryon density r b. Moreover, the connection of the elliptic flow v2 to jet suppression is examined. It is proven experimentally that the collective flow is not faked by minijet fragmentation. Additionally, detailed transport studies show that the away-side jet suppression can only partially (< 50%) be due to hadronic rescattering. Furthermore, the change in sign of v1, v2 closer to beam rapidity is related to the occurence of a high density first order phase transition in the RHIC data at 62.5, 130 and 200 A.GeV.

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Metadaten
Author:Horst StöckerORCiDGND, Elena L. BratkovskayaORCiDGND, Marcus BleicherORCiDGND, Sven SoffORCiD, Xianglei Zhu
URN:urn:nbn:de:hebis:30-6737
ArXiv Id:http://arxiv.org/abs/nucl-th/0412022
Document Type:Preprint
Language:English
Date of Publication (online):2005/04/13
Year of first Publication:2004
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/04/13
GND Keyword:Schwerionenphysik
Note:
Preprint, https://arxiv.org/abs/nucl-th/0412022, später in J.Phys. G 31.2005 S929-S942, doi: 10.1088/0954-3899/31/6/037
HeBIS-PPN:nucl-th/0412022
HeBIS-PPN:128748036
Institutes:Physik / Physik
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht