Tuning the GENIE Pion Production Model with MINERvA Data
Abstract
Faced with unresolved tensions between neutrino interaction measurements at few-GeV neutrino energies, current experiments are forced to accept large systematic uncertainties to cover discrepancies between their data and model predictions. In this paper, the widely used pion production model in GENIE is compared to four MINERvA charged current pion production measurements using NUISANCE. Tunings, ie, adjustments of model parameters, to help match GENIE to MINERvA and older bubble chamber data are presented here. We find that scattering off nuclear targets as measured in MINERvA is not in good agreement with scattering off nucleon (hydrogen or deuterium) targets in the bubble chamber data. An additional ad hoc correction for the low- region, where collective effects are expected to be large, is also presented. While these tunings and corrections improve the agreement of GENIE with the data, the modeling is imperfect. The development of these tunings within the NUISANCE frameworkallows for straightforward extensions to other neutrino event generators and models, and allows omitting and including new data sets as they become available.
Keywords
Cite
@article{arxiv.1903.01558,
title = {Tuning the GENIE Pion Production Model with MINERvA Data},
author = {P. Stowell and L. Pickering and C. Wilkinson and C. V. C. Wret and F. Akbar and D. A. Andrade and M. V. Ascencio and L. Bellantoni and A. Bercellie and M. Betancourt and A. Bodek and A. Bravar and H. Budd and G. Caceres and T. Cai and M. F. Carneiro and J. Chaves and H. da Motta and S. A. Dytman and G. A. Dıaz and J. Felix and L. Fields and A. Filkins and R. Fine and N. Fiza and R. Galindo and H. Gallagher and A. Ghosh and R. Gran and D. A. Harris and S. Henry and S. Jena and D. Jena and J. Kleykamp and M. Kordosky and D. Last and T. Le and X. -G. Lu and E. Maher and S. Manly and W. A. Mann and C. M. Marshall and K. S. McFarland and B. Messerly and J. Miller and J. G. Morfın and J. Mousseau and D. Naples and J. K. Nelson and C. Nguyen and A. Norrick and Nuruzzaman and V. Paolone and G. N. Perdue and M. A. Ramırez and R. D. Ransome and H. Ray and D. Rimal and P. A. Rodrigues and D. Ruterbories and H. Schellman and C. J. Solano Salinas and H. Su and M. Sultana and V. S. Syrotenko and E. Valencia and J. Wolcott and M. Wospakrik and B. Yaeggy and L. Zazueta and D. Zhang},
journal= {arXiv preprint arXiv:1903.01558},
year = {2019}
}