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Elliptic flow at SPS and RHIC: from kinetic transport to hydrodynamics

Anisotropic transverse flow is studied in Pb+Pb and Au+Au collisions at SPS and RHIC energies. The centrality and transverse momentum dependence at midrapidity of the elliptic flow coefficient v_2 is calculated in the hydrodynamic and low density limits. Hydrodynamics is found to agree well with the...

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Detalles Bibliográficos
Autores principales: Kolb, P F, Huovinen, P, Heinz, Ulrich W, Heiselberg, H
Lenguaje:eng
Publicado: 2000
Materias:
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(01)00079-X
http://cds.cern.ch/record/480368
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author Kolb, P F
Huovinen, P
Heinz, Ulrich W
Heiselberg, H
author_facet Kolb, P F
Huovinen, P
Heinz, Ulrich W
Heiselberg, H
author_sort Kolb, P F
collection CERN
description Anisotropic transverse flow is studied in Pb+Pb and Au+Au collisions at SPS and RHIC energies. The centrality and transverse momentum dependence at midrapidity of the elliptic flow coefficient v_2 is calculated in the hydrodynamic and low density limits. Hydrodynamics is found to agree well with the RHIC data for semicentral collisions up to transverse momenta of 1-1.5 GeV/c, but it considerably overestimates the measured elliptic flow at SPS energies. The low density limit LDL is inconsistent with the measured magnitude of v_2 at RHIC energies and with the shape of its p_t-dependence at both RHIC and SPS energies. The success of the hydrodynamic model points to very rapid thermalization in Au+Au collisions at RHIC and provides a serious challenge for kinetic approaches based on classical scattering of on-shell particles.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2000
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spelling cern-4803682019-09-30T06:29:59Zdoi:10.1016/S0370-2693(01)00079-Xhttp://cds.cern.ch/record/480368engKolb, P FHuovinen, PHeinz, Ulrich WHeiselberg, HElliptic flow at SPS and RHIC: from kinetic transport to hydrodynamicsParticle Physics - PhenomenologyAnisotropic transverse flow is studied in Pb+Pb and Au+Au collisions at SPS and RHIC energies. The centrality and transverse momentum dependence at midrapidity of the elliptic flow coefficient v_2 is calculated in the hydrodynamic and low density limits. Hydrodynamics is found to agree well with the RHIC data for semicentral collisions up to transverse momenta of 1-1.5 GeV/c, but it considerably overestimates the measured elliptic flow at SPS energies. The low density limit LDL is inconsistent with the measured magnitude of v_2 at RHIC energies and with the shape of its p_t-dependence at both RHIC and SPS energies. The success of the hydrodynamic model points to very rapid thermalization in Au+Au collisions at RHIC and provides a serious challenge for kinetic approaches based on classical scattering of on-shell particles.hep-ph/0012137CERN-TH-2000-368LBNL-47191oai:cds.cern.ch:4803682000-12-12
spellingShingle Particle Physics - Phenomenology
Kolb, P F
Huovinen, P
Heinz, Ulrich W
Heiselberg, H
Elliptic flow at SPS and RHIC: from kinetic transport to hydrodynamics
title Elliptic flow at SPS and RHIC: from kinetic transport to hydrodynamics
title_full Elliptic flow at SPS and RHIC: from kinetic transport to hydrodynamics
title_fullStr Elliptic flow at SPS and RHIC: from kinetic transport to hydrodynamics
title_full_unstemmed Elliptic flow at SPS and RHIC: from kinetic transport to hydrodynamics
title_short Elliptic flow at SPS and RHIC: from kinetic transport to hydrodynamics
title_sort elliptic flow at sps and rhic: from kinetic transport to hydrodynamics
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0370-2693(01)00079-X
http://cds.cern.ch/record/480368
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AT huovinenp ellipticflowatspsandrhicfromkinetictransporttohydrodynamics
AT heinzulrichw ellipticflowatspsandrhicfromkinetictransporttohydrodynamics
AT heiselbergh ellipticflowatspsandrhicfromkinetictransporttohydrodynamics