Deuteron photodisintegration by polarized photons in the region of the $d^*(2380)$
arXiv:1809.09398 · doi:10.1016/j.physletb.2018.12.026
Abstract
We report the first large-acceptance measurement of the beam-spin asymmetry for deuteron photodisintegration ($\vecγ d\to pn$) in the photon energy range $400<E_γ<630$~MeV. The measurement provides important new constraints on the mechanisms of photodisintegration above the delta resonance and on the photocoupling of the recently discovered $d^*(2380)$ hexaquark.