As neutrino oscillation experiments enter a high-statistics era with the construction of DUNE and Hyper-Kamiokande, achieving a precise understanding of how neutrinos interact with matter is becoming increasingly crucial. In current long-baseline experiments such as T2K, electron neutrino appearance is measured to produce constraints on the charge-parity asymmetry in neutrino oscillations. Among the contributing channels, charged-current pion production, although subdominant, is an important process which has substantial implications on our oscillation results. This talk will explore the significance of this channel and present brand new results of a cross-section measurement of this process on a carbon target using the near detector of the T2K experiment, ND280.

The corresponding DOI of this new result can be found at: https://doi.org/10.1103/klhv-7t6h