Global $\Lambda$ Polarization in high energy collisions

Abstract

With a Yang-Mills flux-tube initial state and a high resolution (3+1)D Particle-in-Cell Relativistic (PICR) hydrodynamics simulation, we calculate the $\Lambda$ polarization for different energies. The origination of polarization in high energy collisions is discussed, and we find linear impact parameter dependence of the global $\Lambda$ polarization. Furthermore, the global $\Lambda$ polarization in our model decreases very fast in the low energy domain, and the decline curve fits well the recent results of Beam Energy Scan (BES) program launched by the STAR collaboration at the Relativistic Heavy Ion Collider (RHIC). The time evolution of polarization is also discussed.

References in corpus (7)

• Angular momentum conservation in heavy ion collisions at very high energy
• Polarization probes of vorticity in heavy ion collisions
• Global quark polarization in non-central $A+A$ collisions
• Global polarization measurement in Au+Au collisions
• $\Lambda$ polarization in peripheral collisions at moderate relativistic energies
• Polarization of Lambda and Anti-Lambda in 920 GeV Fixed-Target Proton-Nucleus Collisions
• Rotation in an exact hydro model

Cited by in corpus (14)

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• Lambda hyperon polarization in relativistic heavy ion collisions from the chiral kinetic approach
• Global polarization of $\Xi$ and $\Omega$ hyperons in Au+Au collisions at $\sqrt{s_{{}_{NN}}}$ = 200 GeV
• A hydrodynamic study of hyperon spin polarization in relativistic heavy ion collisions
• Improved quark coalescence model for spin alignment and polarization of hadrons
• Different space-time freeze-out picture -- an explanation of different $\Lambda$ and $\bar{\Lambda }$ polarization?
• Global $\Lambda$ polarization in moderately relativistic nuclear collisions
• Hydrodynamic helicity polarization in relativistic heavy ion collisions
• Evolution of $\Lambda$ polarization in the hadronic phase of heavy-ion collisions
• Global $\Lambda$ polarization in heavy-ion collisions at energies 2.4--7.7 GeV: Effect of Meson-Field Interaction
• Recent developments in chiral and spin polarization effects in heavy-ion collisions
• Polarization in low energy kaon-hyperon interaction
• Global polarization and spin alignment measurements
• Analytic model studies of polarized baryon production