New determination of the $N$-$Δ(1232)$ axial form factors from weak pion production and coherent pion production off nuclei at T2K and MiniBooNE energies revisited

E. Hernández; J. Nieves; M. Valverde; M. J. Vicente-Vacas

doi:10.1063/1.3644297

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arXiv · 1012.4260

New determination of the $N$-$Δ(1232)$ axial form factors from weak pion production and coherent pion production off nuclei at T2K and MiniBooNE energies revisited

E. Hernández·J. Nieves·M. Valverde·M. J. Vicente-Vacas

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Abstract

We re-evaluate our model predictions in Phys. Rev. D 79, 013002 (2009) for different observables in neutrino induced coherent pion production. This comes as a result of the new improved fit to old bubble chamber data of the dominant axial C_5^A nucleon-to-Delta form factor. We find an increase of 20%-30% in the values for the total cross sections. Uncertainties induced by the errors in the determination of C_5^A are computed. Our new results turn out to be compatible within about $1σ$ with the former ones. We also stress the existing tension between the recent experimental determination of the σ(CC coh π^+)}/σ(NC coh π^0)} $ ratio by the SciBooNE Collaboration and the theoretical predictions.

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E. Hernández, J. Nieves, M. Valverde, M. J. Vicente-Vacas. 2010-12-20. New determination of the $N$-$Δ(1232)$ axial form factors from weak pion production and coherent pion production off nuclei at T2K and MiniBooNE energies revisited. https://doi.org/10.1063/1.3644297

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