Jan 10 – 15, 2021
Weizmann Institute of Science
Asia/Jerusalem timezone
See you at IS2023 in Copenhagen in June 2023

Study of global and local polarization of $\Lambda$ and $\bar{\Lambda}$ hyperons in Pb-Pb collisions at ALICE

Jan 12, 2021, 7:40 PM
1h 30m
Patio (vDLCC)



bullet talk (poster) The initial stages of heavy-ion collisions Poster


Mr Debojit Sarkar (Wayne State University (US))


The system created in relativistic nucleus-nucleus collisions may possess large orbital angular momentum leading to the particle global polarization perpendicular to the reaction plane. The local asymmetries in the velocity fields due to anisotropic flow can generate vorticity and particle polarization along the beam direction. In parity violating weak decays of hyperons, the momentum direction of the decay baryon is correlated with the hyperon spin and can be used to measure the hyperon polarization and thus estimate the global and local vorticity of the system created in relativistic heavy ion collisions. In this talk, the recent experimental measurements of the global and local polarization along the beam direction of the $\Lambda$ and $\bar{\Lambda}$ hyperons in Pb-Pb collisions at 2.76 and 5.02 TeV in ALICE will be discussed.

Primary author

Mr Debojit Sarkar (Wayne State University (US))

Presentation materials