Elliptic and Triangular Flow of Quark-Gluon Plasma in Pb+Pb Collisions in the sPHENIX detector

This paper presents the analysis of the hydrodynamic properties of Quark-Gluon Plasma (QGP) in PbPb collision events collected by the sPHENIX detector, focusing on the elliptic flow () and triangular flow () by analyzing azimuthal angle distribution of particles. The two-dimensional correlation function between azimuthal angle difference () and pseudorapidity difference () that excludes collision pairs with was analyzed. The shape of the graph suggests the hydrodynamic flow during PbPb collisions explicitly. The value of and were compared with the value of the weighted average of eccentricity () and triangularity () with the same centrality (4050%) of the simulated dataset generated by the PHOBOS Glauber Monte Carlo (Glauber MC) code. The trend of elliptic flow and triangular flow as a function of transverse momentum of the experimental data was also examined, and general increasing trends that agree well with that predicted by a multi-phase transport model (AMPT) were found.