2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45074We demonstrate that the form factors of local operators between a heavy meson state (like the~$B$) and a light pseudoscalar state (like the pion) are given exactly by a single pole form in the combined heavy quark, large $N_c$ (number of colors) and chiral limits. We discuss the deviations from this exact result from finite heavy quark masses, non-zero light quark masses and finite $N_c$. We comment on some implications of this result.12 pages (harvmac), Brown-HET-928High Energy Physics - Phenomenologytext