Holographic charm and bottom pentaquarks. III. Excitations through photoproduction of heavy mesons

We consider the photoexcitation of charm and bottom pentaquarks with the holographic assignments [1212-]S=0,1 and [1232-]S=1, in the photoproduction of heavy vector mesons such as charmonia and bottomonia near threshold. We use a Witten diagram to combine the s-channel photoexcitation of holographic pentaquarks with a massive t-channel graviton or tensor glueball exchange, to extract the scattering amplitude for heavy meson photoproduction in the threshold region. The pentaquark signal is too weak to be detected at current electron facilities.