Event shape dependence of anisotropic flow for inclusive and identified hadrons in Pb–Pb and Xe–Xe collisions with ALICE

Abstract

Event Shape Engineering technique has been used to select events corresponding to a specific initial geometry in a given centrality class. For those events, the elliptic (ν2) and triangular (ν3) flow coefficients of inclusive as well as identified particles, including π±, K±, p+p‾, KS0, Λ+Λ‾, and Ξ−+Ξ‾+ are measured in Pb–Pb collisions at sNN=5.02TeV recorded by ALICE. In addition, the ν2 of π±, K±, p+p‾, KS0, and Λ+Λ‾ from Xe–Xe collisions at sNN=5.44TeV is presented. The results obtained using the scalar product method are reported as a function of transverse momentum, pT, within the pseudorapidity (rapidity) range |η| < 0.8 (|y| < 0.5) for various centrality classes. The flow coefficients exhibit a particle mass dependence for pT < 2–3 GeV/c and type grouping (i.e., mesons and baryons) at a higher pT region. The ratios between νn for shape selected and unbiased events are almost flat up to pT = 10 GeV/c, independent of particle species.