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Sep 24 – 29, 2023
US/Eastern timezone

Spin polarization in heavy-ion collisions induced by thermal vorticity and thermal shear

Sep 25, 2023, 2:50 PM
20m
Junior A3 (Durham Convention Center)

Junior A3

Durham Convention Center

Talk Spin in Heavy Ion Collisions Spin in Heavy Ion Collisions

Speaker

Matteo Buzzegoli (Iowa State University)

Description

By measuring the spin polarization of hadrons produced in heavy-ion collisions, it was found that the quark gluon plasma is the most "vorticous" fluid ever observed. This opens the possibility for new phenomenological investigations of spin physics in fluids. Spin polarization is mainly caused by the spin-rotation coupling in relativistic hydrodynamics. In this talk I show how the mean spin polarization vector can be computed starting from a notion of local thermal equilibrium which is compatible with quantum field theory. I show that spin polarization induced by thermal vorticity is related to the form factor related to spin-rotation coupling and that also the shear flow of the fluid contributes to spin polarization. Furthermore, I will also discuss how pseudo-gauge transformations affect the predictions of spin polarization.

Primary author

Matteo Buzzegoli (Iowa State University)

Presentation materials