Neutrino-induced one-pion production revisited: the $\nu_\mu n\to\mu^- n\pi^+$ channel

Understand

Understanding single pion production reactions on free nucleons is the first step towards a correct description of these processes in nuclei, which are important for signal and background contributions in current and near future accelerator neutrino oscillation experiments.

• In this work, we reanalyze our previous studies of neutrino-induced one-pion production on nucleons for outgoing $\pi N$ invariant masses below 1.4 GeV.
• Our motivation is to get a better description of the $\nu_\mu n\to\mu^- n\pi^+$ cross section, for which current theoretical models give values significantly below data.
• This channel is very sensitive to the crossed $\Delta (1232)$ contribution and thus to spin 1/2 components in the Rarita-Schwinger $\Delta$ propagator.