Partial wave analysis of the two neutral pion photoproduction data

摘要

Data on photoproduction of two neutral pions have been taken recently by the CB-ELSA experiment. The partial wave analysis of these data was performed using extended Rarita-Schwinger formalism. The data are dominated by production of resonances in γp channel with strong signal from D13(1520). The properties of this resonance like decay branching ratios and A _(3/2)/A_(1/2) are determined with a good accuracy. The contribution from others baryons are discussed.