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

Autori
Adamczyk, L. ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Zyzak, M.

Kolaboracija
STAR Collaboration

Izvornik
Physical review. C (2469-9985) 93 (2016); 014907, 13

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Centrality, flow, RHIC

Sažetak
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 centrality 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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA