$N^{\ast }$ decays to $N\ddot{I}‰$ from new data on ${\hat{I}}^{3}p\to \ddot{I}‰p$

Abstract

Data on the reaction ${\hat{I}}^{3}p\to \ddot{I}‰p$ with $\ddot{I}‰\to \ddot{I}{€}^0{\hat{I}}^3$, 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 $\hat{I}\pounds$, 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 $\ddot{I}‰$ photoproduction are used to determine twelve $N^{\ast }\to N\ddot{I}‰$ branching ratios; most of these are determined for the first time.

6 pages, 4 figures, 2 tables