{ital N} {r_arrow}{ital {Delta} } Transition from Simultaneous Measurements of p({rvec {gamma}},{pi}) and p({rvec {gamma}},{gamma})

New high-precision measurements of p({rvec {gamma}},{pi}) and p({rvec {gamma}},{gamma}) cross sections and beam asymmetries have been combined with other polarization ratios in a simultaneous analysis of both reactions. Compton scattering has provided two important new constraints on the photopion amplitude. The E2/M1 mixing ratio for the N{r_arrow}{Delta} transition extracted from this analysis is [{minus}3.0{plus_minus}0.3(stat+syst) {plus_minus}0.2 (model)] {percent} . Both data and analysis of this work are in conflict with recent results from Mainz. {copyright} {ital 1997} {ital The American Physical Society}