The VII-th International Conference on the Initial Stages of High-Energy Nuclear Collisions : Initial Stages 2023

The initial state for RHIC BES modelled by three-fluid dynamics

Not scheduled

20m

Copenhagen

Poster The initial stages and nuclear structure in heavy-ion collisions

Speaker

Jakub Cimerman (Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University)

Description

Initial state description in heavy-ion collisions at energies from few to tens of GeV per NN pair brings new challenges as compared to top RHIC or LHC energies. The contraction of the incoming nuclei is much weaker, which results in a long inter-penetration phase and a more complex initial-state geometry. Conventional hydrodynamic models, where the fluid phase starts at a fixed proper time τ0, therefore miss the compression stage of collision. Hence, they may be less sensitive to the EoS of the medium.
In this talk, we present a multi-fluid dynamics approach. The incoming nuclei are represented by two baryon-rich droplets of cold nuclear fluid. The newly produced matter is represented by a third baryon-free fluid, which is generated by the friction between the two colliding fluids.
Our MUlti Fluid simulation for Fast IoN collisions (MUFFIN) is suitable for studies of heavy-ion collisions at RHIC BES. It is newly reimplemented with the use of 3+1 dimensional relativistic viscous hydrodynamic code vHLLE. We discuss the challenges in constructing the approach and present benchmark calculations for Au-Au collisions at different RHIC BES energies.

Presentation materials

IS_poster.pdf