Resonance axial-vector mass from experiments on neutrino-hydrogen and neutrino-deuterium scattering

Abstract

We analyze all available experimental data on the ${\nu }_{\mu }$ and ${\overline{\nu }}_{\mu }$ total and differential cross sections of charged-current single pion production through the decay of intermediate nucleon and baryon resonances measured on hydrogen and deuterium targets in the accelerator experiments at ANL, BNL, FNAL, and CERN. These data are used to determine the current "resonance" axial-vector mass of the nucleon and to fine-tune the nonresonance non-interfering background contribution which described within the Rein-Sehgal approach. For this analysis, we revise the phenomenological model and the experimental dataset for the fits, modify the method of likelihood analysis compared to the previous study. The obtained model parameters coming in combination with a revised strategy for the normalization of the BW distributions are slightly different from the values used by default.

arXiv comment15 pages, 8 figures

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