Cabibbo suppressed single pion production off the nucleon induced by antineutrinos

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.

Comments: 24 pages, 13 figures, this version matches published version in PRD