Magno Study of the azimuthal asymmetry in heavy ion collisions combining initial state momentum orientation and final state collective effects Lucas Soster Moriggi, rison dos Santos Rocha, Magno Valrio Trindade Machado Hide abstract | Show figures | Show BibTeX | Show discussion | View PDF | 2308.00181v1 In the present work we investigate the source of azimuthal asymmetry for nuclear collision using a model that contemplates particles produced in the initial hard collisions and the collective effects described by a Blast-Wave like expansion. The latter is described by the relaxation time approximation of the Boltzmann transport equation. The parameters regarding collective flow and asymmetry are fitted by the experimental data from pT spectrum and v2 for PbPb and XeXe collisions at different centrality classes. As a by-product the ratio of final elliptic flow with the initial anisotropy, v2/ϵ2, and the average transverse momentum are predicted.