2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44208We present an analysis of a Beam-Target double polarization asymmetry in $γn\to Θ^+ K^-$. We show that this quantity can serve as a filter for the determination of the $Θ^+$'s spin-parity assignment near threshold. It is highly selective between $1/2^+$ and $1/2^-$ configurations due to dynamical reasons.Plenary talk at NSTAR2004, Proceedings of the Workshop on the Physics of Excited Nucleons, p.63 (2004), Grenoble, France, Mar. 2004High Energy Physics - PhenomenologyHigh Energy Physics - ExperimentNuclear ExperimentNuclear Theorytext