First neutrino oscillation measurement with KM3NeT/ORCA

• Published in: Proceedings of The 22nd International Workshop on Neutrinos from Accelerators — PoS(NuFact2021)
• Main Authors: Pestel, Valentin, Nauta, Lodewijk, Aly, Zineb
• Other Authors: Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), KM3NeT
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2021
• Subjects: neutrino: atmosphere; neutrino: oscillation; neutrino: mixing angle; neutrino: mass difference; neutrino: mass; neutrino: detector; KM3NeT; sensitivity; ANTARES; experimental results; [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; Orca
• Online Access: https://hal.science/hal-03632761; https://doi.org/10.22323/1.402.0064

International audience The KM3NeT/ORCA detector is a next-generation neutrino telescope at the bottom of the Mediterranean Sea. Optimized for the detection of atmospheric neutrinos with energies between 1 GeV and 100 GeV, KM3NeT/ORCA will offer competitive sensitivity for measuring the neutrino mass ordering, as well as $\theta_{23}$ and $\Delta m^2_{23}$. Currently under construction, 6 of the 115 planed Detection Units are already installed and are steadily taking data since January 2021. This contribution will present the results from the first neutrino oscillation analysis with 1 year of data. These early results already out-perform ANTARES measurements, and approach the sensitivity of current world-leading atmospheric neutrino experiments. The latest estimates of the sensitivity of the complete KM3NeT/ORCA detector are also discussed.