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Volume 341 - The 20th International Workshop on Neutrinos (NuFACT2018) - Wg 2
Neural network study of the nucleon axial form-factor
L. Alvarez-Ruso, K. Graczyk, E.S. Sala*
*corresponding author
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Pre-published on: 2019 October 15
Published on: 2019 December 12
We have performed the first Bayesian neural-network analysis of neutrino-deuteron scattering data. The nucleon axial form factor has been extracted from quasielastic scattering data collected by the Argonne National Laboratory (ANL) bubble chamber experiment using a model-independent parametrization. The results are in agreement with previous determinations only when the low $0.05 < Q^2 < 0.10$~GeV$^2$ region is excluded from the analysis. This suggests that corrections from the deuteron structure may play a crucial role at low $Q^2$, although experimental errors in this kinematic region could have also been underestimated. With new and more precise measurements of neutrino-induced quasielastic scattering on hydrogen and deuterium, the present framework would be readily applicable to unravel the axial structure of the nucleon.
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