$N^{\bf *}$ decays to $Nω$ from new data on $γp\to ωp$

Abstract

Data on the reaction $γp\to ωp$ with $ω\toπ^0γ$, taken with unpolarized or polarized beams in combination with an unpolarized or polarized proton-target, were analyzed within the Bonn-Gatchina (BnGa) partial wave analysis. Differential cross sections, several spin density matrix elements, the beam asymmetry $Σ$, the normalized helicity difference $E$, and the correlation $G$ between linear photon and longitudinal target polarization were included in a large data base on pion and photo-induced reactions. The data on $ω$ photoproduction are used to determine twelve $N^*\to Nω$ branching ratios; most of these are determined for the first time.

6 pages, 4 figures, 2 tables