Cabibbo suppressed single pion production off the nucleon induced by antineutrinos

TL;DR

This paper models strangeness-changing weak interactions leading to single pion production off nucleons, calculating cross sections relevant for neutrino experiments using chiral Lagrangians and resonance mechanisms.

Contribution

It introduces a detailed theoretical model for Cabibbo suppressed pion production driven by antineutrinos, incorporating chiral Lagrangians and resonance contributions for the first time.

Findings

Calculated total cross sections for all channels.

Estimated flux-averaged cross sections for major experiments.

Compared results with other theoretical approaches.

Abstract

In this work we study the $\Sigma\pi$ and $\Lambda\pi$ production off free nucleons driven by the strangeness-changing weak charged current. We calculate the total cross sections for all possible channels and estimate the flux-averaged total cross sections for experiments like MiniBooNE, SciBooNE, T2K, and Minerva. The model is based on the lowest order effective SU(3) chiral Lagrangians in the presence of an external weak charged current and contains Born and the lowest-lying decuplet resonant mechanisms that can contribute to these reaction channels. We also compare and discuss our results with others following similar and very different approaches.