Dynamical coupled-channels model for neutrino-induced meson productions in resonance region

Understand

A dynamical coupled-channels (DCC) model for neutrino-nucleon reactions in the resonance region is developed.

• Starting from the DCC model that we have previously developed through an analysis of $\pi N, \gamma N\to \pi N, \eta N, K\Lambda, K\Sigma$ reaction data for $W\le 2.1$ GeV, we extend the model of the vector current to $Q^2\le$ 3.0 (GeV/$c$)$^2$ by analyzing electron-induced reaction data for both proton and neutron targets.
• We derive axial-current matrix elements that are related to the $\pi N$ interactions of the DCC model through the Partially Conserved Axial Current (PCAC) relation.
• Consequently, the interference pattern between resonant and non-resonant amplitudes is uniquely determined.