Speaker
Description
The Tokai-to-Kamioka (T2K) experiment is a state-of-the-art long-baseline neutrino experiment with the primary objective of measuring neutrino oscillation parameters. The latest oscillation measurements have shown that the dominant systematic uncertainty arises from the modeling of neutrino interactions. The dominant interaction channel at the T2K beam energy is the charged-current interaction with zero pions in the final state (CC-0$\pi$). Since the T2K experiment uses a water Cherenkov far detector (Super-Kamiokande), it is essential to have a good understanding of the neutrino interaction cross-section on oxygen. This can be achieved through measurements of neutrino interactions using the T2K near detector (ND280), which contains carbon and water targets. Moreover, calculating the ratio of the oxygen and carbon cross-sections helps validate various models’ ability to extrapolate between carbon and oxygen nuclear targets. This is required in T2K oscillation analyses and also helps cancel some uncertainties. This study uses all events recorded with the original ND280 detector configuration to measure the muon neutrino charged-current cross-section with no pions in the final state (ν$_\mu$CC-0$\pi$) on carbon and oxygen. This doubles the available data compared to previous T2K results for this interaction channel. The latest status of this measurement will be presented.