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Elliptic Anisotropy ν2 May Be Dominated by Particle Escape instead of Hydrodynamic Flow.
- Source :
-
Nuclear Physics A . Dec2016, Vol. 956, p316-319. 4p. - Publication Year :
- 2016
-
Abstract
- It is commonly believed that azimuthal anisotropies in relativistic heavy ion collisions are generated by hydrodynamic evolution of the strongly interacting quark-gluon plasma. Here we use transport models to study how azimuthal anisotropies depend on the number of collisions that each parton suffers. We find that the majority of ν 2 comes from the anisotropic escape of partons, not from the parton collective flow, for semi-central Au+Au collisions at 200A GeV. As expected, the fraction of ν 2 from the anisotropic particle escape is even higher for smaller systems such as d+Au. Our transport model results also confirm that azimuthal anisotropies would be dominated by hydrodynamic flow at unrealistically-high parton cross sections. Our finding thus naturally explains the similarity of azimuthal anisotropies in small and large systems; however, it presents a challenge to the paradigm of anisotropic flow. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03759474
- Volume :
- 956
- Database :
- Academic Search Index
- Journal :
- Nuclear Physics A
- Publication Type :
- Academic Journal
- Accession number :
- 118739416
- Full Text :
- https://doi.org/10.1016/j.nuclphysa.2016.01.017