Electromagnetic baryon form factors from holographic QCD

In the holographic model of QCD suggested by Sakai and Sugimoto, baryons are chiral solitons sourced by D4 instantons in bulk of size 1/root lambda with lambda = g(2) N-c. We quantize the D4 instanton semiclassically using (h) over bar = 1/(N-c lambda) and non-rigid constraints on the vector mesons. The holographic baryon is a small chiral bag in the holographic direction with a Cheshire cat smile. The vector- baryon interactions occur at the core boundary of the instanton in D4. They are strong and of order 1/root(h) over bar. To order (h) over bar (0) the electromagnetic current is entirely encoded on the core boundary and vector-meson dominated. To this order, the electromagnetic charge radius is of order lambda(0). The meson contribution to the baryon magnetic moments sums identically to the core contribution. The proton and neutron magnetic moment are tied by a model independent relation similar to the one observed in the Skyrme model.