Elliptic flow at RHIC: where and when does it formed?

Details Elliptic flow at RHIC: where and when does it formed? Elliptic flow at RHIC: where and when does it formed?

2004-12-22

arxiv.org/abs/hep-ph/0412343v1

Phys.Lett. B631 (2005) 109-117

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages incl. 5 figures

Scientific paper

Evolution of the elliptic flow of hadrons in heavy-ion collisions at RHIC energies is studied within the microscopic quark-gluon string model. The elliptic flow is shown to have a multi-component structure caused by (i) rescattering and (ii) absorption processes in spatially asymmetric medium. Together with different freeze-out dynamics of mesons and baryons, these processes lead to the following trend in the flow formation: the later the mesons are frozen, the weaker their elliptic flow, whereas baryon fraction develops stronger elliptic flow during the late stages of the fireball evolution. Comparison with the PHOBOS data demonstrates the model ability to reproduce the v2(eta) signal in different centrality bins.

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