Sep 3 – 9, 2023
Hilton of the Americas, 1600 Lamar, Houston, Texas, 77010, USA
US/Central timezone

QGP vortex rings as a new probe for jet-induced medium response and longitudinal dynamics

Sep 5, 2023, 9:10 AM
Ballroom A (Hilton of the Americas)

Ballroom A

Hilton of the Americas

Oral Chirality Chirality


Willian Matioli Serenone (Universidade de São Paulo)


Hydrodynamics provides quantitative descriptions of various flow measurements in heavy-ion collisions, suggesting the strongly-coupled nature of the hot QCD matter. A ubiquitous phenomenon in fluid dynamics is the formation of vortex rings. In heavy-ion collisions, different conditions can give rise to toroidal vortex structure in the QGP medium, such as the medium's response to jet thermalization [1] and the early-stage longitudinal dynamics in asymmetric collisions [2]. Considering these scenarios, in this talk, we will present a systematic study of how $\Lambda$ hyperon's polarization can probe these toroidal vortex structures in QGP. We define a "ring observable" in terms of the $\Lambda$ production plane polarization [2]. It represents a measure of the effects caused by the vorticity induced in the ring formation. By conducting event-by-event analysis with the state-of-the-art (3+1)D theoretical framework [3, 4], we demonstrate that this ring observable is a highly sensitive probe for thermalizing energy-momentum currents deposited from high-energy jets and for the early-time longitudinal dynamics in asymmetric collision systems. An experimental indication of such ``smoke rings'' formed in the QGP would represent a significant advancement in studying the emergent phenomena of many-body QCD at multiple length scales.

[1] W. M. Serenone, D. D. Chinellato, M. A. Lisa, C. Shen, J. Takahashi and G. Torrieri, "$\Lambda$ polarization from thermalized jet energy", Phys. Let. B 820, 126500 (2021)

[2] M. A. Lisa, J. G. P. Barbon, D. D. Chinellato, W. M. Serenone, C. Shen, J. Takahashi and G. Torrieri, "Vortex rings from high energy central p+A collisions", Phys. Rev. C 104, no.1, 011901 (2021)

[3] V. H. Ribeiro, W. M. Serenone, D. D. Chinellato, M. A. Lisa, C. Shen, J. Takahashi and G. Torrieri, "$\Lambda$ polarization from vortex ring as medium response for jet thermalization", arXiv:2305.02428 [hep-ph] (2023)

[4] C. Shen and B. Schenke, "Longitudinal dynamics and particle production in relativistic nuclear collisions", Phys. Rev. C 105, no.6, 064905 (2022)

Category Theory

Primary authors

Chun Shen (Wayne State University) David Dobrigkeit Chinellato (University of Campinas UNICAMP (BR)) Giorgio Torrieri Jun Takahashi (University of Campinas UNICAMP (BR)) Michael Lisa Mr Vítor Hugo Ribeiro Willian Matioli Serenone (Universidade de São Paulo)

Presentation materials