A variant of the harmonic-oscillator (h.o.) model, termed the even-wave h.o. model (with quarks having h.o. interaction in even waves only), which was developed by Mitra and co-workers in a series of recent papers, is applied to the phenomenon of polarized photoproduction. The model, which predicts a ground state of (70,$0^{+}$) and assumes an $8_d$ mixing angle ($cot\theta =\sqrt{2}$) between 56 and 70 states, was recently found to give a good account of (i) the mass spectra of resonances, (ii) low-energy parameters such as $\frac{G_A}{G_V}$, $\Delta \to N\pi$ width, and $\mathrm{NN}\pi$ coupling constant, and (iii) resonance photocouplings, with no free parameters other than a universal spring constant ($\Omega \approx 1$ ${\mathrm{GeV}}^2$). The present investigation reveals that this model agrees better with the data on polarized-target asymmetry as well as $d{\sigma }_{\parallel }$ and $d{\sigma }_{\perp }$ than does the conventional h.o. model.

• Received 11 April 1978

DOI:https://doi.org/10.1103/PhysRevD.19.104