# Sensitivity of the T2K accelerator-based neutrino experiment with an Extended run to $20\times10^{21}$ POT

Abe, K, Andreopoulos, C ORCID: 0000-0003-2020-8215, Antonova, M, Aoki, S, Ariga, A, Autiero, D, Ban, S, Barbi, M, Barker, GJ, Barr, G
et al (show 309 more authors) (2016) Sensitivity of the T2K accelerator-based neutrino experiment with an Extended run to $20\times10^{21}$ POT. [Internet Publication]

Recent measurements at the T2K experiment indicate that CP violation in neutrino mixing may be observed in the future by long-baseline neutrino oscillation experiments. We explore the physics program of an extension to the currently approved T2K running of $7.8\times 10^{21}$ protons-on-target to $20\times 10^{21}$ protons-on-target,aiming at initial observation of CP violation with 3$\,\sigma$ or higher significance for the case of maximum CP violation. With accelerator and beam line upgrades, as well as analysis improvements, this program would occur before the next generation of long-baseline neutrino oscillation experiments that are expected to start operation in 2026.