Global polarization effect and spin-orbit coupling in strong interaction

Abstract

In non-central high energy heavy ion collisions the colliding system posses a huge orbital angular momentum in the direction opposite to the normal of the reaction plane. Due to the spin-orbit coupling in strong interaction, such huge orbital angular momentum leads to the polarization of quarks and anti-quarks in the same direction. This effect, known as the global polarization effect, has been recently observed by STAR Collaboration at RHIC that confirms the theoretical prediction made more than ten years ago. The discovery has attracted much attention on the study of spin effects in heavy ion collision. It opens a new window to study properties of QGP and a new direction in high energy heavy ion physics -- Spin Physics in Heavy Ion Collisions. In this chapter, we review the original ideas and calculations that lead to the predictions. We emphasize the role played by spin-orbit coupling in high energy spin physics and discuss the new opportunities and challenges in this connection.

arXiv commentprepared for "Lecture Notes in Physics", to appear

References in corpus (60)

• An Introduction to PYTHIA 8.2
• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• The Chiral Magnetic Effect
• The effects of topological charge change in heavy ion collisions: "Event by event P and CP violation"
• New Forms of QCD Matter Discovered at RHIC
• Chiral Magnetic and Vortical Effects in High-Energy Nuclear Collisions --- A Status Report
• Multiple Collisions and Induced Gluon Bremsstrahlung in QCD
• Final-State Interactions and Single-Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering
• Effective field theories for heavy quarkonium
• Elliptic flow in Au+Au collisions at sqrt(s_NN) = 130 GeV
• The Spin Structure of the Nucleon
• Angular momentum conservation in heavy ion collisions at very high energy
• Electromagnetic fields and anomalous transports in heavy-ion collisions --- A pedagogical review
• pQCD-based Approach to Parton Production and Equilibration in High-Energy Nuclear Collisions
• Global hyperon polarization at local thermodynamic equilibrium with vorticity, magnetic field and feed-down
• Testing the chiral magnetic and chiral vortical effects in heavy ion collisions
• Spin Alignment of Vector Mesons in Non-central A+A Collisions
• Chiral anomaly and local polarization effect from quantum kinetic approach
• Polarization probes of vorticity in heavy ion collisions
• Global quark polarization in non-central $A+A$ collisions
• Kinetic theory for massive spin-1/2 particles from the Wigner-function formalism
• Relativistic hydrodynamics for spin-polarized fluids
• Vortical fluid and $\Lambda$ spin correlations in high-energy heavy-ion collisions
• Probing vorticity structure in heavy-ion collisions by local $\Lambda$ polarization
• Generating spin polarization from vorticity through nonlocal collisions
• The Spin Structure of the Proton
• Azimuthal and Single Spin Asymmetries in Hard Scattering Processes
• Pseudorapidity distribution and decorrelation of anisotropic flow within CLVisc hydrodynamics
• Thermal vorticity and spin polarization in heavy-ion collisions
• Gluon Shadowing and Hadron Production at RHIC
• The ideal relativistic fluid limit for a medium with polarization
• Anomalous chiral transports and spin polarization in heavy-ion collisions
• What can we learn from global spin alignment of $\varphi$ meson in heavy-ion collisions?
• Asymmetry of Lambda Baryons in Hadronic Z^0 Decays
• Thermodynamic versus kinetic approach to polarization-vorticity coupling
• Relativistic Quantum Transport Theory for Electrodynamics
• Open Charm Production in an Equilibrating Parton Plasma
• Experimental searches for the chiral magnetic effect in heavy-ion collisions
• Feed-down effect on $\Lambda$ spin polarization
• From Entropy and Jet Quenching to Deconfinement?
• Spin content of Lambda and its longitudinal polarization in $e^{+}{e}^{-}$ annihilation at high energies
• Field-induced spin mixing in ultrathin superconducting Al and Be films in high parallel magnetic fields
• Hyperon polarization and single spin left-right asymmetry in inclusive production processes at high energies
• Stretched Strings in Noncommutative Field Theory
• Symmetry Fractionalization in Two Dimensional Topological Phases
• Single spin asymmetries in inclusive high energy hadron-hadron collision processes
• Spin alignment of leading K*(892)^0 mesons in hadronic Z^0 decays
• Magnetic Screening in Thermal Yang-Mills Theories
• The chiral vortical effect in Wigner function approach
• Photon polarization as a probe for quark-gluon plasma dynamics
• The BPS property and its breaking in 1+1 dimensions
• Dynamical Screening and Radiative Parton Energy Loss in a Quark-gluon Plasma
• Thermal Equilibration in an Expanding Parton Plasma
• Lambda and Antilambda polarization in Au-Au collisions at RHIC
• The Spin Alignment of Vector Mesons in High Energy pp Collisions
• Local and global $\Lambda$ polarization in a vortical fluid
• Acceptance effects in the hyperons global polarization measurement
• Dynamics of vortices in chiral media: the chiral propulsion effect
• Three dimensional imaging of the nucleon --- TMD (theory and phenomenology)
• Rapidity dependence of global polarization in heavy ion collisions

Cited by in corpus (12)

• Spin Hall effect in heavy ion collisions
• Spin polarization dynamics in the Gubser-expanding background
• Spin polarization dynamics in the non-boost-invariant background
• QCD phase structure under rotation
• Vector meson's spin alignments in high energy reactions
• Isospin Symmetry of Fragmentation Functions
• Spin polarization dynamics in the Bjorken-expanding resistive MHD background
• Collective dynamics of polarized spin-half fermions in relativistic heavy-ion collisions
• Fluid Acceleration in Heavy-Ion Collisions
• Spin Boltzmann equation for non-relativistic spin-1/2 fermions
• A topological realization of spin polarization through vortex formation in collisions of Bose-Einstein condensates
• Study of spin polarization dependence on rapidity, transverse momentum, and azimuthal angle