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Nonequilibrium Models of Relativistic Heavy-Ion Collisions | | H. Stoecker
; E. L. Bratkovskaya
; M. Bleicher
; S. Soff
; X. Zhu
; | | Date: |
7 Dec 2004 | | Journal: | J.Phys. G31 (2005) S929-S942 | | Subject: | nucl-th | | Affiliation: | Uni. Frankfurt; FIAS), E. L. Bratkovskaya, M. Bleicher, S. Soff (Uni. Frankfurt), X. Zhu (Uni. Frankfurt; FIAS; Univ. Tsinghua, Beijing | | Abstract: | 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$cdot$GeV: here the hydrodynamic model has predicted the collapse of the $v_1$-flow and of the $v_2$-flow at $sim 10$ A$cdot$GeV; at 40 A$cdot$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 $
ho_B$. Moreover, the connection of the elliptic flow $v_2$ 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 $v_1, v_2$ 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$cdot$GeV. | | Source: | arXiv, nucl-th/0412022 | | Services: | Forum | Review | PDF | Favorites | |
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