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

✍ Scribed by A. Silva; D. Urbano; T. Watabe; M. Fiolhais; K. Goeke

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
195 KB
Volume
675
Category
Article
ISSN
0375-9474

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✦ Synopsis

We calculate the ratios E2/M1 and C2/M1 for the electroproduction of the (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 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.

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