Double and single pion photoproduction within a dynamical coupled-channels model

作者：Kamano H^*; Julia Diaz B; Lee T S H; Matsuyama A; Sato T

来源：Physical Review C, 2009, 80(6): 065203.

DOI：10.1103/PhysRevC.80.065203

Within a dynamical coupled-channels model that has already been fixed by analyzing the data of the pi N ->pi N and gamma N ->pi N reactions, we present the predicted double pion photoproduction cross sections up to the second resonance region, W < 1.7 GeV. The roles played by the different mechanisms within our model in determining both the single and double pion photoproduction reactions are analyzed, focusing on the effects attributable to the direct gamma N ->pi pi N mechanism, the interplay between the resonant and nonresonant amplitudes, and the coupled-channels effects. The model parameters that can be determined most effectively in the combined studies of both the single and double pion photoproduction data are identified for future studies.

• 出版日期2009-12