Helicity-dependent generalization of the JIMWLK evolution

Understand

We generalize the JIMWLK evolution equation to include the small-$x$ evolution of helicity distributions.

• To derive helicity JIMWLK, we use the method devised by A.H.
• Mueller for the usual unpolarized JIMWLK, and apply it to the helicity evolution equations derived earlier.
• We obtain a functional evolution equation for the generalized JIMWLK weight functional.