%0 Journal Article
%T Prehydrodynamic evolution in large and small systems
%A Nunes da Silva, T.
%A Chinellato, D. D.
%A Giannini, A. V.
%A Takahashi, J.
%A Ferreira, M. N.
%A Denicol, G. S.
%A Hippert, M.
%A Noronha, J.
%A Luzum, M.
%J Physical Review C
%D 2023
%V 107
%N 4
%I Amer Physical Soc
%@ 2469-9985
%G English
%F NunesdaSilva_etal2023
%O WOS:000974911400001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5524), last updated on Sat, 27 May 2023 09:37:12 +0000
%X We extend our previous investigation of the effects of prehydrodynamic evolution on final-state observables in heavy-ion collisions [38] to smaller systems. We use a state-of-the-art hybrid model for the numerical simulations with optimal parameters obtained from a previous Bayesian study. By studying p-Pb collisions, we find that the effects due to the assumption of a conformal evolution in the prehydrodynamical stage are even more important in small systems. We also show that this effect depends on the time duration of the pre-equilibrium stage, which is further enhanced in small systems. Finally, we show that the recent proposal of a free-streaming with subluminal velocity for the pre-equilibrium stage, thus effectively breaking conformal invariance, can alleviate the contamination of final-state observables. Our study further reinforces the need for moving beyond conformal approaches in pre-equilibrium dynamics modeling, especially when extracting transport coefficients from hybrid models in the high-precision era of heavy-ion collisions.
%R 10.1103/PhysRevC.107.044901
%U https://arxiv.org/abs/2211.10561
%U https://doi.org/10.1103/PhysRevC.107.044901
%P 044901-12pp