Centrality dependence of identified particle elliptic flow in relativistic heavy ion collisions at √sNN = 7.7–62.4 GeV

Adamczyk, L. and Planinić, Mirko and Poljak, Nikola and Zyzak, M. (STAR Collaboration) (2016) Centrality dependence of identified particle elliptic flow in relativistic heavy ion collisions at √sNN = 7.7–62.4 GeV. Physical Review C, 93 (1). pp. 14907-13. ISSN 2469-9985

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Abstract

Elliptic flow (v2) values for identified particles at midrapidity in Au + Au collisions measured by the STAR experiment in the Beam Energy Scan at the Relativistic Heavy Ion Collider at √sNN = 7.7–62.4 GeV are presented for three centrality classes. The centrality dependence and the data at √sNN = 14.5 GeV are new. Except at the lowest beam energies, we observe a similar relative v2 baryon-meson splitting for all centrality classes which is in agreement within 15% with the number-of-constituent quark scaling. The larger v2 for most particles relative to antiparticles, already observed for minimum bias collisions, shows a clear entrality dependence, with the largest difference for the most central collisions. Also, the results are compared with a multiphase transport (AMPT) model and fit with a blast wave model.

Item Type: Article
Date: 19 January 2016
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2016 American Physical Society. Received 29 September 2015. Published 19 January 2016.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 16 Sep 2017 19:28
Last Modified: 16 Sep 2017 19:28
URI: http://digre.pmf.unizg.hr/id/eprint/5564

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