Directed and elliptic flow of charged particles in Cu + Cu collisions at sNN=22.4 GeV

G. Agakishiev et al. (STAR Collaboration)
Phys. Rev. C 85, 014901 – Published 3 January 2012

Abstract

This paper reports results for directed flow v1 and elliptic flow v2 of charged particles in Cu + Cu collisions at sNN=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 v1 is independent of the system size at 62.4 and 200 GeV and also extend the scaling of v1 with η/ybeam to this system. The measured v2(pT) in Cu + Cu collisions is similar for sNN throughout the range 22.4 to 200 GeV. We also report a comparison with results from transport model (ultrarelativistic quantum molecular dynamics and multiphase transport model) calculations. The model results do not agree quantitatively with the measured v1(η),v2(pT), and v2(η).

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  • Received 26 September 2011

DOI:https://doi.org/10.1103/PhysRevC.85.014901

©2012 American Physical Society

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Vol. 85, Iss. 1 — January 2012

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