We extend and review our analysis of the nucleon → ∆(1232) transition electroweak form factors from Ref. . New fit of the ∆(1232) vector form factors to electron-proton scattering F2 structure function is introduced as well, leading to results different from the popular parametrization of Ref. . A clear model dependence of the extracted parameters emerges. Fit to neutrino scattering data is performed in all available isospin channels. The resulting axial mass is MA ∆=0.85-0.08+0.09(GeV) and C5A(0 )=1.10-0.14+0.15 . The latter value is in accordance with Goldberger-Treiman relation as long as the deuteron effects are included.
American Institute of Physics Conference Series
- Pub Date:
- October 2015
- High Energy Physics - Phenomenology
- 10 pages, 5 figures. Proceedings of the CETUP*2014 workshop "Neutrino Interactions", corrected version