Speaker
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.
