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

Details The electroproduction of the $Δ$(1232) in the chiral quark-soliton model The electroproduction of the $Δ$(1232) in the chiral quark-soliton model

1999-05-13

arxiv.org/abs/hep-ph/9905326v2

Nucl.Phys. A675 (2000) 637-657

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, Latex, 3 figures, uses epsf

Scientific paper

10.1016/S0375-9474(00)00195-0

We calculate the ratios E2/M1 and C2/M1 for the electroproduction of the $\Delta$(1232) in the region of photon virtuality $0<-q^2<1$ GeV$^2$. The magnetic dipole amplitude M1 is also presented. The theory used is the chiral quark-soliton model, which is based in the instanton vaccum of the QCD. The calculations are performed in flavor 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.

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