Neutrino oscillations with atmospheric neutrinos at large liquid argon TPCs

We propose to study atmospheric neutrino interactions with a unique event topology to distinguish neutrinos and anti-neutrinos using a liquid argon time projection chamber in an experiment such as DUNE.The detection of charged-current 1 proton (CC1P) and charged-current no proton (CC0P) events will allow us to access neutrino oscillation physics complementary to accelerator-based beam neutrinos.Assuming maximal CP violation ( = ∕2) as the true hypothesis, our analysis shows that it is possible to disfavour CP conservation =0 (or ) with more than 2 (≈ 1.6) with a data sample of 140 kt-yr of atmospheric neutrinos in the DUNE detector.Our analysis also shows that assuming normal mass-ordering as the true hypothesis, the sensitivity to the opposite mass-ordering can be disfavoured with a significance close to 4 and an octant of 23 sensitivity with more than 2 both for a true lower octant ( 23 =41 • ) and higher octant ( 23 =49 • ) value.