Thermodynamics at finite spin density for Dirac fermions in a boost invariant fluid

par Andrea Palermo (Stony Brook University)

lundi 8 juin 2026, 11:00 → 12:00 Europe/Paris

Amphi G.Besse (Subatech IMT Atlantique)

The Quark-Gluon Plasma (QGP) produced in heavy-ion collisions provides a unique opportunity to probe a genuinely quantum property of matter, such as spin, in a fluid-dynamic regime. According to the most successful model, spin polarization is produced by vortices and shear flow. However, some puzzles remain which may require the introduction of an independent thermodynamic spin variable to be solved. In this talk, after reviewing the status of polarization physics in heavy ion collisions, I will discuss the effect of such a spin potential in a simple setup of a gas of fermions in a boost-invariant fluid. I will compute thermodynamic functions exactly, show that the only source of polarization is the spin potential, and discuss phenomenological implications for QGP physics.