Delta baryon photoproduction with twisted photons*

A future gamma factory at CERN or accelerator-based gamma sources elsewhere can include the possibility of energetic twisted photons, which are photons with a structured wave front that can allow a pre-defined large angular momentum along the beam direction.  Twisted photons are potentially a new tool in hadronic physics, and we consider here one possibility, namely the photoproduction of Delta(1232) baryons using twisted photons.  We show that particular polarization amplitudes isolate the smaller partial wave amplitudes and they are measurable without interference from the terms that are otherwise dominant.