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Anisotropic flow of strange particles at RHIC | E. Zabrodin
; L. Bravina
; G. Burau
; J. Bleibel
; C. Fuchs
; Amand Faessler
; | Date: |
29 Jun 2005 | Journal: | J.Phys. G31 (2005) S995-S999 | Subject: | hep-ph nucl-ex nucl-th | Abstract: | Space-time picture of the anisotropic flow evolution in Au+Au collisions at BNL RHIC is studied for strange hadrons within the microscopic quark-gluon string model. The directed flow of both mesons and hyperons demonstrates wiggle structure with the universal antiflow slope at |y| < 2 for minimum bias events. This effect increases as the reaction becomes more peripheral. The development of both components of the anisotropic flow is closely related to particle freeze-out. Hadrons are emitted continuously, and different hadronic species are decoupled from the system at different times. These hadrons contribute differently to the formation and evolution of the elliptic flow, which can be decomposed onto three components: (i) flow created by hadrons emitted from the surface at the onset of the collision; (ii) flow produced by jets; (iii) hydrodynamic flow. Due to these features, the general trend in elliptic flow formation is that the earlier mesons are frozen, the weaker their elliptic flow. In contrast, baryons frozen at the end of the system evolution have stronger v2. | Source: | arXiv, hep-ph/0506303 | Services: | Forum | Review | PDF | Favorites |
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