dorsal/arxiv
View SchemaNonequilibrium Models of Relativistic Heavy-Ion Collisions
| Authors | H. Stoecker, E. L. Bratkovskaya, M. Bleicher, S. Soff, X. Zhu |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0412022 |
| URL | https://arxiv.org/abs/nucl-th/0412022 |
| DOI | 10.1088/0954-3899/31/6/037 |
| Journal | J.Phys. G31 (2005) S929-S942 |
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 $\rho_B$. 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.
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"abstract": "We review the results from the various hydrodynamical and transport models on\nthe collective flow observables from AGS to RHIC energies. A critical\ndiscussion of the present status of the CERN experiments on hadron collective\nflow is given. We emphasize the importance of the flow excitation function from\n1 to 50 A$\\cdot$GeV: here the hydrodynamic model has predicted the collapse of\nthe $v_1$-flow and of the $v_2$-flow at $\\sim 10$ A$\\cdot$GeV; at 40\nA$\\cdot$GeV it has been recently observed by the NA49 collaboration. Since\nhadronic rescattering models predict much larger flow than observed at this\nenergy we interpret this observation as evidence for a first order phase\ntransition at high baryon density $\\rho_B$. Moreover, the connection of the\nelliptic flow $v_2$ to jet suppression is examined. It is proven experimentally\nthat the collective flow is not faked by minijet fragmentation. Additionally,\ndetailed transport studies show that the away-side jet suppression can only\npartially ($\u003c$ 50%) be due to hadronic rescattering. Furthermore, the change in\nsign of $v_1, v_2$ closer to beam rapidity is related to the occurence of a\nhigh density first order phase transition in the RHIC data at 62.5, 130 and 200\nA$\\cdot$GeV.",
"arxiv_id": "nucl-th/0412022",
"authors": [
"H. Stoecker",
"E. L. Bratkovskaya",
"M. Bleicher",
"S. Soff",
"X. Zhu"
],
"categories": [
"nucl-th"
],
"doi": "10.1088/0954-3899/31/6/037",
"journal_ref": "J.Phys. G31 (2005) S929-S942",
"title": "Nonequilibrium Models of Relativistic Heavy-Ion Collisions",
"url": "https://arxiv.org/abs/nucl-th/0412022"
},
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