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Directed and elliptic flow of charged particles in Cu+Cu collisions at $\sqrt{\bm {s_{NN}}} =$ 22.4 GeV

Abstract : This paper reports results for directed flow $v_{1}$ and elliptic flow $v_{2}$ of charged particles in Cu+Cu collisions at $\sqrt{s_{NN}}=$ 22.4 GeV at the Relativistic Heavy Ion Collider. The measurements are for the 0-60% most central collisions, using charged particles observed in the STAR detector. Our measurements extend to 22.4 GeV Cu+Cu collisions the prior observation that $v_1$ is independent of the system size at 62.4 and 200 GeV, and also extend the scaling of $v_1$ with $\eta/y_{\rm beam}$ to this system. The measured $v_2(p_T)$ in Cu+Cu collisions is similar for $\sqrt{s_{NN}} = 22.4-200$ GeV. We also report a comparison with results from transport model (UrQMD and AMPT) calculations. The model results do not agree quantitatively with the measured $v_1(\eta), v_2(p_T)$ and $v_2(\eta)$.
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http://hal.in2p3.fr/in2p3-00666980
Contributor : Dominique Girod <>
Submitted on : Monday, February 6, 2012 - 3:52:47 PM
Last modification on : Monday, June 15, 2020 - 3:00:02 PM

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G. Agakishiev, W. Borowski, Magali Estienne, S. Kabana. Directed and elliptic flow of charged particles in Cu+Cu collisions at $\sqrt{\bm {s_{NN}}} =$ 22.4 GeV. Physical Review C, American Physical Society, 2012, 85, pp.014901. ⟨10.1103/PhysRevC.85.014901⟩. ⟨in2p3-00666980⟩

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