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

Event-by-event QGP vortex ring probing the 3D dynamics of asymmetric relativistic nuclear collisions

Not scheduled

20m

Copenhagen

Poster Collective dynamics from small to large systems

Speaker

Chun Shen (Wayne State University)

Description

Vortex ring formation is a ubiquitous characteristic of strongly-coupled fluids. In asymmetric relativistic heavy-ion collisions, the early-stage longitudinal dynamics can generate toroidal structures of fluid vorticity in the beam direction [1]. In this talk, we will be discussing our systematical study analysis of an experimental observable to examine this structure using state-of-the-art (3+1)D event-by-event simulations [2]. We first calibrate the 3D MC-Glauber + MUSIC + UrQMD framework with the particle rapidity distributions and anisotropic flow measurements. Then we conduct a system scan that involves (p, $^3$He, Cu, Au)+Au collisions to investigate the vortex ring observable at the top RHIC energy. Furthermore, we explore utilizing this approach to constrain the QGP transport properties from experimental data, which complements anisotropic flow measurements. Experimental observation of a smoke ring in $\Lambda$ production plane polarization would represent a significant step forward in probing the complex dynamics of these asymmetric collisions at the length scale of velocity gradients.

[1] M. Lisa, J. Barbon, D. Chinellato, W. Serenone, C. Shen, J. Takahashi and G. Torrieri, "Vortex rings from high energy central p+A collisions," Phys. Rev. C104, no.1, 011901 (2021)

[2] C. Shen and B. Schenke, "Longitudinal dynamics and particle production in relativistic nuclear collisions," Phys. Rev. C105, no.6, 064905 (2022)