The electroproduction of the Δ(1232) in the chiral quark–soliton model Original Research Article

We calculate the ratios E2 / M1 and C2 / M1 for the electroproduction of the Δ(1232) in the region of photon virtuality 0<−q2<1 GeV 2 . The magnetic dipole amplitude M1 is also presented. The theory used is the chiral quark–soliton model, which is based on the instanton vacuum of the QCD. The calculations are performed in flavours SU(2) and SU(3) taking rotational ( 1/Nc ) corrections into account. The results for the ratios agree qualitatively with the available data, although the magnitude of both ratios seems to underestimate the latest experimental results.