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

We analyze all available experimental data on the nu(mu) and (nu) over bar (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 noninterfering 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 Breit-Wigner distributions are slightly different from the values used by default.

Automated summary

The study analyzed experimental data on charged-current single pion production through the decay of intermediate nucleon and baryon resonances, measured on hydrogen and deuterium targets in accelerator experiments. The analysis fine tuned the nonresonance noninterfering background contribution and determined the current resonance axial-vector mass of the nucleon. By revising the phenomenological model and experimental dataset for fits and modifying the likelihood analysis method, slightly different model parameters were obtained.