2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008

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