On Recent Weak Single Pion Production Data

TL;DR

This paper compares recent MiniBooNE and MINERvA data on weak single pion production, highlighting discrepancies with Monte Carlo simulations in normalization and shape, and discusses the underlying dynamical mechanisms involved.

Contribution

It analyzes and contrasts recent experimental data with Monte Carlo models, revealing significant differences in normalization and shape of pion production cross sections.

Findings

Data and simulations show different normalization factors.

Shape of differential cross sections differs between data and models.

Correlation observed in simulations is absent in experimental data.

Abstract

MiniBooNE [1] and MINERvA [2] charge current {\pi} + production data in the Delta region are discussed. It is argued that despite the differences in neutrino flux they measure the same dynamical mechanism of pion production and should be strongly correlated. The correlation is clearly seen in the Monte Carlo simulations done with NuWro generator but is missing in the data. Both normalization and the shape of the ratio of measured differential cross sections in pion kinetic energy are different from the Monte Carlo results, in the case of normalization a discrepancy is by a factor of 1.49.