Investigation of Particle Antiparticle Elliptic Flow Difference at STAR Experiment

Abstract

The azimuthal anisotropy in particle emission in the transverse plane, known as anisotropic flow, is used to study the properties of strongly interacting hot and dense medium created in heavy-ion collisions. Anisotropic flow coefficients are the key observables which reflect the viscous hydrodynamic response to the initial spatial anisotropy, produced in the early stages of the collision. In previous studies performed by the Solenoidal Tracker At RHIC (STAR) collaboration at the Relativistic Heavy Ion Collider (RHIC) the increase of the elliptic flow ($${{{v}}_{2}}$$) difference between particles and antiparticles at the lower collision energies has been observed. In these proceedings we present the measurement of the two-particle elliptic and triangular flow correlations for identified particles performed by the STAR experiment. Our measurements are compared with the EPOS model simulations as well.