Study of Pion Production in \nu_\mu CC Interactions on O16 Using Different MC Generators

TL;DR

This paper compares pion production predictions in muon neutrino charged-current interactions on oxygen using four different Monte Carlo generators, analyzing their similarities, differences, and the impact of model parameter variations.

Contribution

It provides a comparative analysis of pion production in neutrino interactions across multiple MC generators, highlighting differences and effects of model parameters.

Findings

Differences in pion topology predictions among generators

Impact of axial mass parameter variations on results

Identification of similarities in primary pion production

Abstract

In this report we present simulated event numbers, for various MC generators, for pion production in $\nu_{\mu}$ CC reactions on $\nucl{16}{O}$. For the simulation we used four different neutrino interaction generators: GENIE, FLUKA, NEUT, and NuWro, as proposed during the 45th Karpacz Winter School on neutrino interactions. First we give a brief outline of the theoretical models relevant to pion production. We then present results, in the form of tables showing the occupancy of primary and final state pion topologies, for all the generated samples. Finally we compare the results from the different generators and draw conclusions about the similarities and differences. For some of the generators we explore the effect of varying the axial mass parameter or the use of a different nuclear model.