KM3NeT-ORCA and JUNO combined sensitivity to the neutrino mass ordering

• Main Authors: Veronique Van Elewyck, Nhan Chau, Leonidas Kalousis, Marcos Dracos, Antoine Kouchner, João Pedro Athayde Marcondes De André, Eric Baussan
• Format: Conference Object
• Language: unknown
• Published: Zenodo 2020
• Subjects: Orca
• Online Access: https://doi.org/10.5281/zenodo.4124091

The neutrino mass ordering (NMO) is one of the fundamental questions in neutrino physics. This can be unraveled by next-generation neutrino detectors such as JUNO and KM3NeT-ORCA. JUNO is a medium-baseline (53 km) reactor experiment which could be sensitive to the NMO by investigating the interference effects between fast oscillations in oscillated electron-antineutrino spectrum. KM3NeT-ORCA is the Mton-scale water Cherenkov detector under construction in the Mediterranean Sea abyss. It can determine the NMO by probing Earth matter effect on atmospheric neutrinos. When measuring $\Delta m^2_{31}$ with a wrong ordering assumption, the best fit values are different between the two experiments. This tension could help enhancing the sensitivity to NMO in a joint fit. In this poster, the possibility of NMO determination from a combined analysis of JUNO and KM3NeT-ORCA is presented.