Pre-hydrodynamic evolution and its signatures in final-state observables

Nov 4, 2019, 5:40 PM
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Initial state and approach to equilibrium Poster Session


Mauricio Hippert Teixeira (Universidade de São Paulo)


The system created in high-energy heavy-ion collisions quickly reaches local equilibrium and its evolution is usually modeled with relativistic hydrodynamics. However, the effects of the early, pre-equilibrium stages of system evolution on final-state observables are largely unknown. In this work, we study the effects of pre-hydrodynamic evolution on final-state observables in various heavy-ion collision systems. We employ state-of-the art hydrodynamic simulations coupled to different pre-hydrodynamical scenarios, including Kompost, a recently-developed effective kinetic transport theory evolution model. We find that the addition of a pre-equilibrium stage can have a significant effect on the development of transverse momentum, but only a small effect on flow and fluctuations, even differentially in transverse momentum. These results impose constraints on the way in which the initial particle production immediately after the initial hard scattering is connected to the subsequent hydrodynamic evolution of the system.

Primary authors

Prof. Tiago José Nunes da Silva (Universidade Federal de Santa Catarina) David Dobrigkeit Chinellato (University of Campinas UNICAMP (BR)) Mauricio Hippert Teixeira (Universidade de São Paulo) Matthew Luzum Jorge Noronha (University of Sao Paulo) Willian Matioli Serenone (Universidade de Campinas) Jun Takahashi (University of Campinas UNICAMP (BR))

Presentation materials