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The electroproduction of the Delta(1232) in the chiral quark-soliton model

Authors: A. Silva, D. Urbano, T. Watabe, M. Fiolhais, and K. Goeke

Ref.: Nuclear Physics A 675, 637-657 (2000)

Abstract: We calculate the ratios E2/M1 and C2/M1 for the electroproduction of the Delta (1232) in the region of photon virtuality 0 < -q(2) < 1 GeV2. 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/N-c) 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.

URL: nautilus.fis.uc.pt