THE LEPTONIC MODE: THE ELECTRON AS RESONANCE OF THE MINORITY-MASS ENDPOINT (XV v6)

In the FCD-RBv6 pregeometric framework, the leptonic sector is derived from the boundary elastodynamics of trans-brane Einstein–Rosen (ER) dipoles regularized at the Compton floor R₀ ≈ 0.6308 fm. We establish five core principles: (1) Uniqueness of Fractional Charges: +2/3e and -1/3e are proved to be the unique algebraic solutions to integer nucleon boundary constraints without free parameters. (2) The Electron as a Surface Rayleigh Wave: localized acoustic resonance at the minority-mass endpoint (λ_– = 0.3163) carrying spin-1/2 via helical winding holonomy. (3) The Y-Gate Elastic Plug Function: the electron acts as an elastic boundary plug sealing Mouth A against the negative pressure of the AdS₅ bulk (ρ_bulk + 3p_bulk < 0); its annihilation triggers non-radiative leptonic unplugging and dipole collapse into the fifth dimension (Part XXXIII). (4) The Triplet Cancellation Rule: opposite-chirality A-endpoints in the proton (AAB) interfere destructively, projecting exactly one net orbital electron mode. (5) The Neutron Magnetic Moment: corrected to μ_n ≈ -1.913 μ_N via subcritical residual phase resonance (ε_B ≈ 0.10). (6) Beta Decay: conservative B → A mode redistribution without braid breaking (Δ² invariant) or mass transport across the bulk. All gravitational and gauge couplings strictly preserve adiabatic invariance (dS = 0), eliminating phenomenological fluid friction.