In-Plane Elliptic Flow of Resonance Particles in Relativistic Heavy-Ion Collisions

Details In-Plane Elliptic Flow of Resonance Particles in Relativistic Heavy-Ion Collisions In-Plane Elliptic Flow of Resonance Particles in Relativistic Heavy-Ion Collisions

2000-04-12

arxiv.org/abs/nucl-th/0004029v2

Phys.Rev.Lett. 86 (2001) 2754-2757

Physics

Nuclear Physics

Nuclear Theory

6 pages, 3 figures, revtex

Scientific paper

10.1103/PhysRevLett.86.2754

We analyze the second Fourier coefficient $v_2$ of the pion azimuthal distribution in non-central heavy-ion collisions in a relativistic hydrodynamic model. The exact treatment of the decay kinematics of resonances leads to almost vanishing azimuthal anisotropy of pions near the midrapidity, while the matter elliptic flow is in-plane at freeze-out. In addition, we reproduce the rapidity dependence of $v_2$ for pions measured in non-central Pb + Pb collisions at 158$A$ GeV. This suggests that resonance particles as well as stable particles constitute the in-plane flow and are important ingredients for the understanding of the observed pion flow.

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