The Problem: The electron has a magnetic moment ($\mu_e$) about 658 times larger than the proton's. If an electron is sitting inside the neutron (even in a vortex), its massive magnetic "signal" should be visible. But the neutron’s magnetic moment is very small and negative ($-1.91 \mu_N$).
The Vortex Fix? If the "Collar" of fluid is itself charged (using your $\epsilon$ coupling), and it is rotating in the opposite direction of the electron's spin, it could create a Counter-Magnetic Field.
The Math Goal: The Vortex must generate a magnetic moment that "masks" the electron's $\mu_e$, leaving only the small residual value we measure.
Check: Can your $\epsilon \approx 11.7$ coupling generate enough "magnetic drag" to cancel the electron’s signature?