Nucleon electroweak form factors using spin-improved holographic light-front wavefunctions

We construct spin-improved holographic light front wavefunctions for the nucleons (viewed as quark-diquark systems) and use them to successfully predict their electromagnetic Sachs form factors, charge radii, well axial factor, radius of proton. The confinement scale is universal mass light-front holography, previously extracted from spectroscopic data hadrons. With Dirac Pauli factors normalized using quark counting rules measured anomalous magnetic moments respectively, masses diquark are only remaining adjustable parameters. fix set proton's Dirac-to-Pauli factor ratio, then all other without any further adjustments Agreement with at low momentum-transfer excellent. Our findings support idea that (pseudoscalar vector) mesons share a nonperturbative wavefunction which modified differently by spin structures.