Elliptic Flow of Identified Hadrons in $A u + A u$ Collisions at $\sqrt{s_{N N}} = 200 G e V$

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30 October 2003

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 91 (18) , 182301
https://doi.org/10.1103/physrevlett.91.182301

Abstract

The anisotropy parameter (

v_{2}

), the second harmonic of the azimuthal particle distribution, has been measured with the PHENIX detector in

A u + A u

collisions at

\sqrt{s_{N N}} = 200 G e V

for identified and inclusive charged particle production at central rapidities (

| η | < 0.35

) with respect to the reaction plane defined at high rapidities (

| η | = 3 - 4

). We observe that the

v_{2}

of mesons falls below that of (anti)baryons for

p_{T} > 2 G e V / c

, in marked contrast to the predictions of a hydrodynamical model. A quark-coalescence model is also investigated.

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This publication has 21 references indexed in Scilit:

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Physical Review Letters, 2003
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Elliptic Flow in $A u + A u$ Collisions at $\sqrt s_{NN} = 130 GeV$
Physical Review Letters, 2001