Speaker
Description
We propose a hybrid approach, which may help to establish consistency between different formulations of spin hydrodynamics. The perfect fluid is described in the framework of kinetic theory of particles with spin 1/2 following the Fermi-Dirac statistics. The baryon number, energy, linear momentum, the spin part of angular momentum, as well as entropy are conserved, although in the presence of spin degrees of freedom the expressions for the baryon current, the energy-momentum tensor and the spin tensor contain terms whose mathematical form is seemingly typical of dissipative corrections. Genuinely dissipative terms are introduced in our approach via the Israel-Stewart method, using the condition of positive entropy production, which allows for transfer between the spin and orbital parts of angular momentum.
Based on: Zbigniew Drogosz, Wojciech Florkowski, Mykhailo Hontarenko, Hybrid approach to perfect and dissipative spin hydrodynamics, Phys. Rev. D 110, 096018 (2024)
