Abstract
The azimuthal anisotropy of particle emission is a good observable to study the property of the quark gluon plasma (QGP), from the point of view of not only its collective dynamics but also the energy loss of hard scattered partons in it. We measured charged hadron v2 as a function of pT in 0.5 < pT < 10 GeV/c for minimum bias and several centrality Au+Au collisions at using the RHIC Year-2014 data, which significantly improved the statistical precision compared to the previous results. It was found that the v2’s for charged hadrons are consistently above zero up to pT = 10 GeV/c over the centralities. It was also found that there is a difference in v2 between charged hadrons and neutral pions for pT <7 GeV/c.
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