Components of the elliptic flow in Pb–Pb collisions at

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• 作者：Piotr Boż ; ek^a ; ^b ; ^{piotr.bozek@ifj.edu.pl"" rel=""nofollow}
• 关键词：Heavy-ion collisions ; Hydrodynamics ; Collective flow
• 刊名：Physics Letters B
• 出版年：2011
• 出版时间：16 May 2011
• 年：2011
• 卷：699
• 期：4
• 页码：283-286
• 全文大小：188 K

文摘

We calculate the elliptic flow of charged particles in Pb–Pb collisions at in relativistic viscous hydrodynamics. The recent data of the ALICE Collaboration on the elliptic flow as function of the centrality can be very well described using the hydrodynamic expansion of a fluid with a small shear viscosity η/s=0.08. The elliptic flow as function of the transverse momentum shows systematic deviations from a hydrodynamic behavior in the small momenta region p<800 MeV. It indicates that a non-negligible contribution of non-thermalized particles from jet fragmentation is present.