Using a proper-time expansion in the Color Glass Condensate, the authors compute the glasma's vorticity and local angular momentum along the beam axis and find they are qualitatively different, with the local angular momentum's quadrupole sign matching the measured Lambda polarization.
The angular momentum carried by the nucleons which will participate in the collision is of order 105 at maximum RHIC energies [38, 39] and even larger at LHC energies
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Angular momentum of glasma
Using a proper-time expansion in the Color Glass Condensate, the authors compute the glasma's vorticity and local angular momentum along the beam axis and find they are qualitatively different, with the local angular momentum's quadrupole sign matching the measured Lambda polarization.