Local and global polarization in a vortical fluid
arXiv:1704.03569 · doi:10.1016/j.nuclphysa.2017.04.008
Abstract
We compute the fermion spin distribution in the vortical fluid created in off-central high-energy heavy-ion collisions. We employ the event-by-event (3+1)D viscous hydrodynamic model. The spin polarization density is proportional to the local fluid vorticity in quantum kinetic theory. As a result of strong collectivity, the spatial distribution of the local vorticity on the freeze-out hyper-surface strongly correlates to the rapidity and azimuthal angle distribution of fermion spins. We investigate the sensitivity of the local polarization to the initial fluid velocity in the hydrodynamic model and compute the global polarization of Λ hyperons by the AMPT model. The energy dependence of the global polarization agrees with the STAR data.
4 pages, 4 figures, Quark Matter 2017 proceeding
References in corpus (4)
Cited by in corpus (12)
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- Thermal vorticity and spin polarization in heavy-ion collisions
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- Initial Angular Momentum and Flow in High Energy Nuclear Collisions
- Charge asymmetry dependence of the elliptic flow splitting in relativistic heavy-ion collisions
- Dynamics of vortices in chiral media: the chiral propulsion effect
- Proca equation and vector field quantization in rotating system
- Estimating Longitudinal Polarization of and Hyperons at Relativistic Energies using Hydrodynamic and Transport models
- An Initial State with Shear in Peripheral Heavy Ion Collisions
- Jet Quenching in The Most Vortical Fluid: A Holographic Approach