Elliptic flow (v_{2}) 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 sqrt{s_{NN}}= 7.7-62.4 GeV are presented for
three centrality classes. The centrality dependence and the data at
sqrt{s_{NN}}= 14.5 GeV are new. Except at the lowest beam energies we observe a
similar relative v_{2} baryon-meson splitting for all centrality classes which
is in agreement within 15% with the number-of-constituent quark scaling. The
larger v_{2} for most particles relative to antiparticles, already observed for
minimum bias collisions, shows a clear centrality dependence, with the largest
difference for the most central collisions. Also, the results are compared with
AMPT calculations and fit with a Blast Wave model.
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.