Anisotropic Flow Measurements of Identified Particles in The STAR Experiment
S. Lan*
on behalf of the STAR collaboration*: corresponding author
Pre-published on:
August 23, 2022
Published on:
September 01, 2022
Abstract
We report results of v1 and v2 for identified hadrons (π±,K±,K0S,p,ϕ and Λ) from Au+Au collisions at √sNN = 3 GeV and v2 for π±,K±,p and ˉp at √sNN = 27 and 54.4 GeV using the STAR detector at RHIC. In Au+Au collisions at high energies, one finds that the values of v2 are all positive and the number-of-constituent-quark (NCQ) scaling holds. On the other hand, results from collisions at 3 GeV, the midrapidity v2 is negative for all hadrons and NCQ scaling is absent. In addition, the midrapidity v1 slopes for all hadrons are found to be positive. Furthermore, the features of negative v2 and positive v1 slope at 3 GeV can be reproduced by calculations with baryonic mean-field potential in transport model. These results imply that in 3 GeV Au+Au collisions, the medium is characterized by baryonic interactions.
DOI: https://doi.org/10.22323/1.400.0005
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