XVII Polish Workshop on Relativistic Heavy-Ion Collisions: Phase diagram and Equation of State of strongly interacting matter

Differential study of $\Lambda$-hyperon polarization in central heavy-ion collisions

15 Dec 2024, 12:45

15m

Faculty of Physics (Warsaw University of Technology)

Session 3

Speaker

Mr Oleksandr Vitiuk (University of Wroclaw (PL))

Description

We present a differential study of $\Lambda$ hyperon polarization in central Au+Au collisions at $\sqrt{s_{NN}} = 7.7$ GeV, employing the microscopic transport model UrQMD in conjunction with the statistical hadron-resonance gas model. The resulting thermal vorticity configuration effectively manifests as the formation of two vortex rings in the forward and backward rapidity regions. We show that the polarization of $\Lambda$ hyperons exhibits oscillatory behaviour as a function of the azimuthal angle, offering a novel means to probe the structure of the fireball in central heavy-ion collisions.

Presentation materials

Polish_Workshop_2024_expanded.pdf