Analysis of $\hat{I}{”}^{+}(1232)$ Isobar Observables, with Improved Quark Distribution Amplitudes

Abstract

A model distribution amplitude for the $\hat{I}{”}^{+}(1232)$ isobar is proposed, derived on the basis of the QCD sum-rule calculations of Farrar et al. combined with those of Carlson and Poor. The transition form factor ${\hat{I}}^{3}p\hat{I}{”}^{+}$ is calculated modeling the proton by selected distribution amplitudes. Furthermore, predictions are made for some exclusive charmonium decays into $\hat{I}”\bar{\hat{I}}”$. The obtained results are compared with other theoretical models and with the available data.

15 pages, RUB-TPII-22/92 Preprint