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Area of Science:

  • High-energy physics
  • Nuclear physics
  • Condensed matter physics

Background:

  • Spin hydrodynamic generation, driven by fluid rotation, is observed in relativistic nuclear collisions.
  • Experiments show a puzzling difference in spin polarization between particles and anti-particles.

Purpose of the Study:

  • To propose a novel mechanism for generating long-lived in-medium magnetic fields in heavy-ion collisions.
  • To explain the observed particle-antiparticle spin polarization asymmetry.

Main Methods:

  • Investigating the connection between fluid vorticity and magnetic field generation.
  • Applying this mechanism to the charged quark-gluon fluid (subatomic swirl).

Main Results:

  • A magnetic field naturally arises along the fluid vorticity in the charged subatomic swirl.
  • This mechanism provides a non-trivial explanation for the observed spin polarization differences.

Conclusions:

  • The proposed magnetic field generation mechanism offers a new perspective on spin hydrodynamics.
  • It resolves the puzzling particle-antiparticle asymmetry in spin polarization observed in heavy-ion collisions.