The study of unconventional baryon structure in the light quark sector with the BGOOD photoproduction experiment

The BGOOD photoproduction experiment accesses forward meson angles and low momentum exchange kinematics in the $uds$ sector, which may be sensitive to molecular-like hadron structure. Our results in the strangeness sector suggest a dominant role of meson-baryon dynamics. This includes structures in $K^0\Sigma^0$, $K^+\Sigma^0$ and $K^+\Sigma^0(1385)$ residing at $\Sigma^{(*)}K^{(*)}$ thresholds which have an equivalence of the $P_C$ states at the $\Sigma_C^{(*)}\bar D^{(*)}$ thresholds. In the non-strange baryon-baryon sector, forward differential cross section measurements of coherent meson photoproduction off the deuteron are orders of magnitude higher than model calculations and what would be anticipated due to the large momentum transferred to the deuteron. The origin of these enhancements, for example intermediate dibaryon formation or final state interactions of pion re-scattering is still under debate.