Feb 18 – 26, 2021
Europe/Rome timezone

Neutrino mass ordering determination through a combined JUNO and KM3NeT/ORCA analysis

Feb 25, 2021, 12:10 PM
Room 2 (https://unipd.link/NeuTel-ParallelRoom2)

Room 2


Parallel Flash talk Neutrino Telescopes and Multimessenger Astrophysical Models


Nhan Chau (APC laboratory)


The neutrino mass ordering (NMO) is one of the fundamental questions in neutrino physics. KM3NeT/ORCA and JUNO are two neutrino oscillation experiments both aiming at measuring the NMO with different approaches: ORCA with atmospheric neutrinos transversing matter/Earth and JUNO with reactor neutrinos. This talk presents the potential of determining the NMO through a combined analysis of JUNO and ORCA data. In a joint fit, the NMO sensitivity is enhanced beyond the simple sum of the sensitivities of each experiment due to the tension between their $\Delta m_{31}^2$ best fit in a wrong ordering assumption. From this analysis, we expect to determine the true NMO with $5~\sigma$ significance after $1~-~2$ years of data taking by both experiments for the current global best-fit values of the oscillation parameters, while maximally 6 years will be needed for any other parameter set.

Collaboration name KM3NeT

Primary author

Nhan Chau (APC laboratory)


Veronique Van Elewyck (APC & Université Paris Diderot) Antoine Kouchner (APC - University parsi Diderot) Dr João Pedro Athayde Marcondes de André (IPHC/IN2P3/CNRS) Leonidas Kalousis (IPHC) Marcos Dracos (IPHC, Université de Strasbourg, CNRS/IN2P3)

Presentation materials