NUKLEONIKA 2006, 51(Suppl. 3):s3-s6
Larissa V. Bravina1,2, Konrad Tywoniuk2, Evgeny E. Zabrodin1,2, Gerhard Burau3, Johannes Bleibel3, Christian Fuchs3, Amand Faessler3
1 Department of Physics, University of Oslo,
PB 1048 Blindern, N-0316 Oslo, Norway
2 Institute for Nuclear Physics,
Moscow State University, RU-119899 Moscow, Russia
3 Institute for Theoretical Physics,
University of Tübingen, 14 Auf der Morgenstelle, D-72076 Tübingen, Germany
It appears that in microscopic calculations hadrons are continuously emitted from the whole reaction
volume. Different species decouple at different times. At RHIC energies significant fractions of
both mesons and baryons are emitted from the surface region within the first two fm/c. The hadrons
contribute differently to the formation and evolution of the anisotropic flow, which can be decomposed
into 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, e.g., the
elliptic flows of mesons and baryons have different transverse momentum dependences. Comparison with
experimental data reveals that centrality, rapidity, and transverse momentum dependences of the
anisotropic flow are reproduced, at least qualitatively, by the microscopic models.