Abstract

The higher order harmonic flow observables νn (n > 3) and their non-linear responses to the initial state anisotropy have the strong potential to constrain shear and bulk viscosity to entropy ratios because of different sensitivities for various stages of heavy-ion collisions. The measurements of the flow coefficients and the non-linear coefficients up to the ninth and fifth harmonic, respectively, are presented in Pb–Pb collisions at sNN=5.02TeV for charged hadrons. In addition, the results of pT-differential non-linear flow modes for π±, K±, p+p¯, K0s, Λ+Λ¯s0 and ϕ are presented. The results are compared to the same measurements at 2.76 TeV and calculations from state of the art hydrodynamic models.

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