Electroweak Single Pion Production and Form Factors of the Δ(1232) Resonance
arXiv:1501.03086 · doi:10.1063/1.4931872
Abstract
We extend and review our analysis of the nucleon \to Δ(1232) transition electroweak form factors from Ref. [1]. New fit of the Δ(1232) vector form factors to electron-proton scattering F_2 structure function is introduced as well, leading to results different from the popular parametrization of Ref. [2]. 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 M_{AΔ}=0.85^{+0.09}_{-0.08} (GeV) and $C_5^A(0) = 1.10^{+0.15}_{-0.14}. The latter value is in accordance with Goldberger-Treiman relation as long as the deuteron effects are included.
10 pages, 5 figures. Proceedings of the CETUP*2014 workshop "Neutrino Interactions", corrected version
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