2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/188502We study baryons in an AdS/CFT model of QCD by Sakai and Sugimoto, realized as small instantons with fundamental string hairs. We introduce an effective field theory of the baryons in the five-dimensional setting, and show that the instanton interpretation implies a particular magnetic coupling. Dimensional reduction to four dimensions reproduces the usual chiral effective action, and in particular we estimate the axial coupling $g_A$ between baryons and pions and the magnetic dipole moments, both of which are proportional to $N_c$. We extrapolate to finite $N_c$ and discuss subleading corrections.4 pages, typos fixed, discussions reworded to clarify a unit, a reference updatedHigh Energy Physics - TheoryHigh Energy Physics - PhenomenologyNuclear Theorytext