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Elliptic flow (v_2) values for identified particles at midrapidity in Au + Aucollisions measured by the STAR experiment in the Beam Energy Scan at theRelativistic Heavy Ion Collider at sqrt{s_{NN}}= 7.7--62.4 GeV are presentedfor three centrality classes. The centrality dependence and the data atsqrt{s_{NN}}= 14.5 GeV are new. Except at the lowest beam energies we observe asimilar relative v_2 baryon-meson splitting for all centrality classes which isin agreement within 15% with the number-of-constituent quark scaling. Thelarger v_2 for most particles relative to antiparticles, already observed forminimum bias collisions, shows a clear centrality dependence, with the largestdifference for the most central collisions. Also, the results are compared withA Multiphase Transport Model and fit with a Blast Wave model.

Centrality dependence of identified particle elliptic flow in relativistic heavy ion collisions at sqrt(s)= 7.7--62.4 GeV