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.

prepared for "Lecture Notes in Physics", to appear

References in corpus (11)

• An Introduction to PYTHIA 8.2
• The Chiral Magnetic Effect
• Angular momentum conservation in heavy ion collisions at very high energy
• Testing the chiral magnetic and chiral vortical effects in heavy ion 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
• Azimuthal and Single Spin Asymmetries in Hard Scattering Processes
• Experimental searches for the chiral magnetic effect in heavy-ion collisions
• Photon polarization as a probe for quark-gluon plasma dynamics
• Rapidity dependence of global polarization in heavy ion collisions

Cited by in corpus (11)

• 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
• Study of spin polarization dependence on rapidity, transverse momentum, and azimuthal angle
• A topological realization of spin polarization through vortex formation in collisions of Bose-Einstein condensates