Saturation of azimuthal anisotropy in Au+Au collisions at √sNN=62-200 GeV

Adler, S. S. ; Kapoor, S. S. ; et., al (2005) Saturation of azimuthal anisotropy in Au+Au collisions at √sNN=62-200 GeV Physical Review Letters, 94 (23). 232302_1-232302_6. ISSN 0031-9007

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New measurements are presented for charged hadron azimuthal correlations at midrapidity in Au+Au collisions at √sNN=62.4 and 200 GeV. They are compared to earlier measurements obtained at √sNN=130 GeV and in Pb+Pb collisions at √sNN=17.2 GeV. Sizeable anisotropies are observed with centrality and transverse momentum (pT) dependence characteristic of elliptic flow (v2). For a broad range of centralities, the observed magnitudes and trends of the differential anisotropy, v2(pT), change very little over the collision energy range √sNN=62-200 GeV, indicating saturation of the excitation function for v2 at these energies. Such a saturation may be indicative of the dominance of a very soft equation of state for √sNN~60-200 GeV.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:16631
Deposited On:15 Nov 2010 13:32
Last Modified:17 May 2016 01:22

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