Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-07-04
Phys.Rev.Lett. 89 (2002) 202302
Physics
Nuclear Physics
Nuclear Theory
4 pages, 1 figure, revtex
Scientific paper
10.1103/PhysRevLett.89.202302
Based on the quark coalescence model for the parton-to-hadron phase transition in ultra-relativistic heavy ion collisions, we relate the elliptic flow ($v_2$) of high $\pt$ hadrons to that of high $\pt$ quarks. For high $\pt$ hadrons produced from an isospin symmetric and quark-antiquark symmetric partonic matter, magnitudes of their elliptic flows follow a flavor ordering as $(v_{2,\pi}=v_{2,N}) > (v_{2,\Lambda}=v_{2,\Sigma}) > v_{2,K} > v_{2,\Xi} > (v_{2,\phi}=v_{2,\Omega})$ if strange quarks have a smaller elliptic flow than light quarks. The elliptic flows of high $\pt$ hadrons further follow a simple quark counting rule if strange quarks and light quarks have same high $\pt$ spectrum and coalescence probability.
Ko Che Ming
Lin Zi-wei
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