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 (23)

• Globally Polarized Quark-gluon Plasma in Non-central A+A Collisions
• Angular momentum conservation in heavy ion collisions at very high energy
• Relativistic distribution function for particles with spin at local thermodynamical equilibrium
• Rotating quark-gluon plasma in relativistic heavy ion collisions
• Polarization probes of vorticity in heavy ion collisions
• Vorticity in Heavy-Ion Collisions
• A study of vorticity formation in high energy nuclear collisions
• Global quark polarization in non-central $A+A$ collisions
• Lambda Polarization in Peripheral Heavy Ion Collisions
• Polarization of massive fermions in a vortical fluid
• Global polarization measurement in Au+Au collisions
• Quark Polarization in a Viscous Quark-Gluon Plasma
• $\Lambda$ and $\bar{\Lambda }$ Production in Central Pb-Pb Collisions at 40, 80, and 158 A$\cdot$GeV
• The initial state of ultra-relativistic heavy ion collision
• Effective String Rope Model for the initial stages of Ultra-Relativistic Heavy Ion Collisions
• $\Lambda$ polarization in peripheral collisions at moderate relativistic energies
• Polarization of Lambda and Anti-Lambda in 920 GeV Fixed-Target Proton-Nucleus Collisions
• New method for measuring longitudinal fuctuations and directed flow in ultrarelativistic heavy ion reactions
• Matching Stages of Heavy Ion Collision Models
• Lambda Polarization in an Exact Rotating and Expanding fluid dynamical model for peripheral heavy ion reactions
• Rotation in an exact hydro model
• Global polarization measurement in Au+Au collisions
• Antihyperon polarization in high-energy inclusive reactions

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• A quark coalescence model for polarized vector mesons and baryons
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• Polarization transfer in hyperon decays and its effect in relativistic nuclear collisions
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• Ideal spin hydrodynamics from Wigner function approach
• Estimates of hyperon polarization in heavy-ion collisions at collision energies $\sqrt{s_{NN}}=$ 4--40 GeV
• Spin polarization dynamics in the Gubser-expanding background
• Different space-time freeze-out picture -- an explanation of different $\Lambda$ and $\bar{\Lambda }$ polarization?
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• Global $\Lambda$ polarization in moderately relativistic nuclear collisions
• Vorticity and hyperon polarization at NICA energies
• Local Equilibrium Spin Distribution From Detailed Balance
• Vorticity and Spin Polarization --- A Theoretical Perspective
• Pseudo-gauges and relativistic spin hydrodynamics for interacting Dirac and Proca fields
• Quantum kinetic theory for dynamical spin polarization from QED-type interaction
• Spin Polarization Formula for Dirac Fermions at Local Equilibrium
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• Effect of thermal shear on longitudinal spin polarization in a thermal model
• Correlation between global polarization, angular momentum and flow in heavy-ion collisions
• Spin polarization dynamics in the non-boost-invariant background
• The chiral vortical effect in Wigner function approach
• New Developments in Relativistic Fluid Dynamics with spin
• Kubo formulae for first-order spin hydrodynamics
• Lorentz-covariant nonlocal collision term for spin-1/2 particles
• Hyperon polarization along the beam direction relative to the second and third harmonic event planes in isobar collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Analytic solutions of relativistic dissipative spin hydrodynamics with radial expansion in Gubser flow
• Lambda polarization in heavy ion collisions: from RHIC BES to LHC energies
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• Fluid Dynamics Study of the $\Lambda$ Polarization for Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV
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• Spin alignment of vector mesons by second-order hydrodynamic gradients
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• Spin evolution of massive fermion in QED plasma
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• Quantum kinetic theory for spin transport of quarks with background chromo-electromagnetic fields
• Spin polarization dynamics in the Bjorken-expanding resistive MHD background
• Linear mode analysis from spin transport equation
• Anomalous magnetohydrodynamics with temperature-dependent electric conductivity and application to the global polarization
• Vorticity in the QGP liquid and $\Lambda$ polarization at the RHIC Beam Energy Scan
• Local Spin Polarization in 200 GeV Au+Au and 2.76 TeV Pb+Pb Collisions
• Helicity and vorticity in heavy-ion collisions at NICA energies
• Vorticity and $\Lambda$ polarization in the microscopic transport model PACIAE
• An introduction to relativistic spin hydrodynamics
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• Anomalous gravitomagnetic moment and non-universality of the axial vortical effect at finite temperature
• Collisional corrections to spin polarization from quantum kinetic theory using Chapman-Enskog expansion
• Global $\Lambda$ polarization in heavy-ion collisions at energies 2.4--7.7 GeV: Effect of Meson-Field Interaction
• Global polarization in heavy-ion collisions based on axial vortical effect
• Initial Angular Momentum and Flow in High Energy Nuclear Collisions
• Nucleon spin polarization in intermediate-energy heavy-ion collisions
• Vorticity and Polarization in Heavy Ion Collisions: Hydrodynamic Models
• Effects of Longitudinal Asymmetry in Heavy-Ion Collisions
• Collective dynamics of polarized spin-half fermions in relativistic heavy-ion collisions
• Propagation of spin channel waves
• Polarization in low energy kaon-hyperon interaction
• Recent developments in chiral and spin polarization effects in heavy-ion collisions
• Spectator induced electromagnetic effects in heavy-ion collisions and space-time-momentum conditions for pion emission
• Electromagnetic radiation at extreme angular velocity
• Longitudinal asymmetry and its effect on pseudorapidity distributions in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV
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• Hyperon global polarization in heavy-ion collisions at NICA energies. Feed-down effects and the role of ${\Sigma }^0$ hyperons
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• Can pion spectra in Pb+Pb collisions at CERN SPS energies be described by those in p+p reactions and energy-momentum conservation ? Rapidity distributions of pions in p+p and Pb+Pb collisions at CERN SPS energies
• $\Lambda$ and $\overline{\Lambda }$ Freeze-Out Distributions and Global Polarizations in Au+Au Collisions
• Proca equation and vector field quantization in rotating system
• Spin Effects In Heavy Ion Collisions at High Energies
• Estimating Longitudinal Polarization of $\Lambda$ and $\bar{\Lambda }$ Hyperons at Relativistic Energies using Hydrodynamic and Transport models
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• Hyperon Production in Bi+Bi Collisions at NICA and Angular Dependence of Hyperon Spin Polarization
• Investigate the $\Lambda$ and $\bar{\Lambda }$ polarization splitting effect with combined mechanisms
• An Initial State with Shear in Peripheral Heavy Ion Collisions
• Study of Lambda polarization at RHIC BES and LHC energies
• Alternative methods to measure global polarization of $\Lambda$ hyperons
• Polarization and Chirality: the quantum features of the Quark Gluon Plasma
• Polarization Dynamics in Paramagnet of Charged Quark-Gluon Plasma
• Spin Boltzmann equation for non-relativistic spin-1/2 fermions
• Probing early-time longitudinal dynamics with the $\Lambda$ hyperon's spin polarization in relativistic heavy-ion collisions
• Study of spin polarization dependence on rapidity, transverse momentum, and azimuthal angle
• Analytic model studies of polarized baryon production
• Global polarization and spin alignment measurements
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• Global hyperon polarization and effects of decay feeddown