Extraction of the D13(1520) photon-decay couplings from pion- and eta-photoproduction data
arXiv:nucl-th/9911030 · doi:10.1103/PhysRevC.62.048201
Abstract
We compare results for the D13(1520) photon-decay amplitudes determined in analyses of eta- and pion-photoproduction data. The ratio of helicity amplitudes (A_3/2 / A_1/2), determined from eta-photoproduction data, is quite different from that determined in previous analyses of pion-photoproduction data. We consider how strongly the existing pion-photoproduction data constrain both this ratio and the individual photon-decay amplitudes.
7 pages, 2 figures