Vorticity and hyperon polarization at NICA energies

Abstract

We study the formation of fluid vorticity and the hyperon polarization in heavy-ion collisions at NICA energies in the framework of the Parton-Hadron-String Dynamic Model, taking into account both hadronic and quark-gluonic (partonic) degrees of freedom. The vorticity properties in peripheral Au+Au collisions at $\sqrt{s_{NN}}=$7.7\,GeV are demonstrated and confronted with other models. The obtained result for the $\Lambda$ polarization is in agreement with the experimental data by the STAR collaboration, whereas the model is not able to explain the observed high values of the anti-hyperon $\bar{\Lambda }$ polarization.

9 pages, 6 figure. arXiv admin note: text overlap with arXiv:1704.01507 by other authors

References in corpus (12)

• Big-Bang Nucleosynthesis
• 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 $\Lambda$ Polarization in high energy collisions
• Flow Vorticity in Peripheral High Energy Heavy Ion Collisions
• Lambda hyperon polarization in relativistic heavy ion collisions from the chiral kinetic approach
• The ideal relativistic spinning gas: polarization and spectra
• Examination of the directed flow puzzle in heavy-ion collisions
• Chiral symmetry restoration in heavy-ion collisions at intermediate energies
• $\Lambda$ polarization in peripheral collisions at moderate relativistic energies
• Study of Lambda polarization at RHIC BES and LHC energies

Cited by in corpus (37)

• Polarization and Vorticity in the Quark Gluon Plasma
• Probing vorticity structure in heavy-ion collisions by local $\Lambda$ polarization
• Thermal vorticity and spin polarization in heavy-ion collisions
• Anomalous chiral transports and spin polarization in heavy-ion collisions
• Vorticity in low-energy heavy-ion collisions
• Local spin alignment of vector mesons in relativistic heavy-ion collisions
• Estimates of hyperon polarization in heavy-ion collisions at collision energies $\sqrt{s_{NN}}=$ 4--40 GeV
• Different space-time freeze-out picture -- an explanation of different $\Lambda$ and $\bar{\Lambda }$ polarization?
• Azimuthal angle dependence of the longitudinal spin polarization in relativistic heavy ion collisions
• Global $\Lambda$ polarization in moderately relativistic nuclear collisions
• Hyperon Polarization from the Vortical Fluid in Low Energy Nuclear Collisions
• Holographic drag force in 5d Kerr-AdS black hole
• Correlation between global polarization, angular momentum and flow in heavy-ion collisions
• Relaxation time for quark spin and thermal vorticity alignment in heavy-ion collisions
• Fluid Dynamics Study of the $\Lambda$ Polarization for Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV
• Directed flow of D mesons at RHIC and LHC: non-perturbative dynamics, longitudinal bulk matter asymmetry and electromagnetic fields
• Relaxation time for the alignment between the spin of a finite-mass quark/antiquark and the thermal vorticity in relativistic heavy-ion collisions
• Vorticity and Particle Polarization in Relativistic Heavy-Ion Collisions
• Evolution of $\Lambda$ polarization in the hadronic phase of heavy-ion collisions
• Applied Holography of the AdS${}_5$-Kerr Spacetime
• Helicity and vorticity in heavy-ion collisions at NICA energies
• Fermion propagator in a rotating environment
• Anomalous gravitomagnetic moment and non-universality of the axial vortical effect at finite temperature
• Global polarization in heavy-ion collisions based on axial vortical effect
• Global $\Lambda$ polarization in heavy-ion collisions at energies 2.4--7.7 GeV: Effect of Meson-Field Interaction
• Photon radiation by relatively slowly rotating fermions in magnetic field
• Magneto-rotational dissociation of heavy hadrons in Relativistic Heavy-Ion Collisions
• $\Lambda$ and $\overline{\Lambda }$ Freeze-Out Distributions and Global Polarizations in Au+Au Collisions
• Hyperon global polarization in heavy-ion collisions at NICA energies. Feed-down effects and the role of ${\Sigma }^0$ hyperons
• Impact of strong magnetic field, baryon chemical potential, and medium anisotropy on polarization and spin alignment of hadrons
• Hyperon Production in Bi+Bi Collisions at NICA and Angular Dependence of Hyperon Spin Polarization
• Spin Effects In Heavy Ion Collisions at High Energies
• Examination of the possibility of ${\pi }^0$ condensation and magnetization in freely interpenetrating nuclei
• Fluid Acceleration in Heavy-Ion Collisions
• Helicity polarization in relativistic heavy ion collisions
• The Static Heavy Quark-Antiquark Potential within String Theory in Arbitrary Stationary Backgrounds
• Spin contribution to the dissociation of bound states in rotating medium in magnetic field