Elliptic flow of light nuclei in Au+Au collisions at √s_NN = 200 GeV

2011/01/21 by Jena, Chitrasen
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear Experiment (nucl-ex)

paper · doi:10.48550/arxiv.1101.4196

Abstract

We present the elliptic flow (v₂) of light nuclei at mid-rapidity in Au+Au collisions at √s_NN = 200 GeV. The results are measured in the STAR experiment at RHIC. The v₂ measurement for light nuclei as a function of transverse momentum p_T is found to follow an approximate atomic mass number (A) scaling. We compare the measured nuclei v₂ to results from a dynamical coalescence model calculation. The v₂ values for light nuclei are further scaled to the number of constituent quarks (NCQ) of their constituent nucleons and are consistent with NCQ scaled v₂ for baryons and mesons. The dominance of partonic collectivity in the transverse expansion dynamics in these collisions naturally produces such a consistent picture. Similar to other hadrons, an increase of p_T-integrated v₂ scaled by the participant eccentricity as a function of collision centrality has been observed.

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