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Saturation of azimuthal anisotropy in Au + Au collisions at (square root)s(NN) = 62-200 GeV.
- Source :
-
Physical review letters [Phys Rev Lett] 2005 Jun 17; Vol. 94 (23), pp. 232302. Date of Electronic Publication: 2005 Jun 17. - Publication Year :
- 2005
-
Abstract
- New measurements are presented for charged hadron azimuthal correlations at midrapidity in Au+Au collisions at (square root)s(NN) = 62.4 and 200 GeV. They are compared to earlier measurements obtained at (square root)s(NN) = 130 GeV and in Pb + Pb collisions at (square root)s(NN) = 17.2 GeV. Sizeable anisotropies are observed with centrality and transverse momentum (pT) dependence characteristic of elliptic flow (upsilon2). For a broad range of centralities, the observed magnitudes and trends of the differential anisotropy, upsilon2(pT), change very little over the collision energy range (square root)s(NN) = 62-200 GeV, indicating saturation of the excitation function for upsilon2 at these energies. Such a saturation may be indicative of the dominance of a very soft equation of state for (square root)s(NN) approximately 60-200 GeV.
Details
- Language :
- English
- ISSN :
- 0031-9007
- Volume :
- 94
- Issue :
- 23
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 16090463
- Full Text :
- https://doi.org/10.1103/PhysRevLett.94.232302