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Sep 24 – 29, 2023
US/Eastern timezone

Thermal shear and $\Lambda$ polarization in heavy-ion collisions

Sep 28, 2023, 7:00 PM
2h
Grand Ballroom I (Durham Convention Center)

Grand Ballroom I

Durham Convention Center

Poster Spin in Heavy Ion Collisions Poster Session

Speaker

Andrea Palermo (Frankfurt UNiversity)

Description

The polarization of the $\Lambda$ hyperon is a key observable in the study of the Quark-Gluon Plasma produced in heavy ion collisions. Recent studies have highlighted the importance of considering the thermal shear tensor, the symmetric derivative of the four-temperature vector, in the calculations of polarization as it can accommodate the discrepancy between theoretical predictions and experimental data. We review the derivation of the thermal shear tensor contribution to the $\Lambda$ polarization and perform numerical simulations of heavy-ion collisions at RHIC and LHC energies using the hybrid SMASH+vHLLE. Polarization is calculated in different freeze-out scenarios including the feed-down corrections. We discuss the dependence of the results on the initial conditions and collision energy and compare them with the available experimental data.

Primary authors

Andrea Palermo (Frankfurt UNiversity) Dr Eduardo Grossi (Università di Firenze) Prof. francesco Becattini (Università di Firenze)

Presentation materials

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