Abstract
We report the measurements of global spin polarization of hyperons (PΛ) from FAIR, RHIC and LHC energies. The PΛ continues to follow an increasing trend at √SNN < 7.7 GeV indicating that enormous vorticity prevails even in hadronic dominant region. New measurements of local spin polarization (Pz,2) from isobar collisions follow the same pattern observed in previous RHIC and LHC energies. An observable motivated by predicted baryonic Spin Hall Effect, the net local polarization (Pz,2net), show a negative value in Au+Au collisions at √SNN = 19.6 and 27 GeV. The first Pz measurement with respect to third order harmonic in 200 GeV RHIC isobar collisions shows a non-zero sine modulation, indicating the presence of complex vortical structure in the medium. Surprising new patterns of spin alignment (ρ00) for various vector mesons (K*0, K*±, ϕ and J/ψ emerged at both RHIC and LHC energies. The large deviation in ρ00 of several species poses challenge to the theory.
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