The dynamic intrinsic orbital momentum in 3He-A

The intrinsic orbital momentum of 3He A-phase is considered which determines the inertia in the equation of orbital motion. The momentum value cannot be unambiguously defined with the microscopic theory available because of the uncertainty of the contribution of boojums (points at the Fermi surface where the gap reduces to zero). Some additional arguments (the existence of hydrodynamic Lagrangian and local law of conservations of momentum) suggest that the momentum value is high and there are no anomalous terms ∼ l(rotlxl) in superfluid current at T=0