The E2/M1ratio in Δ photoproduction

New high-precision measurements of p (γ,π) and p (γ,γ) cross sections and beam asymmetries have been combined with other polarisation ratios in a simultaneous analysis of both reactions. The E 2/ M 1 mixing ratio for the N →Δ transition extracted from this analysis is EMR =−3.0%±0.3( stat+sys )±0.2 (model).