Determining the neutrino mass ordering and oscillation parameters with KM3NeT/ORCA

• Published in: The European Physical Journal C
• Main Authors: Aiello, S., Albert, A., Alves Garre, S., Aly, Z., Ambrosone, A., Ameli, F., Andre, M., Androulakis, G., Anghinolfi, M., Anguita, M., Anton, G., Ardid Ramírez, Miguel, Ardid-Ramírez, Joan Salvador, Aublin, J., Bagatelas, C., Bou Cabo, Manuel, Diego-Tortosa, D., Espinosa Roselló, Víctor, Martínez Mora, Juan Antonio, Poirè, Chiara
• Other Authors: Universitat Politècnica de València. Escuela Técnica Superior de Ingeniería del Diseño - Escola Tècnica Superior d'Enginyeria del Disseny, Universitat Politècnica de València. Instituto de Investigación para la Gestión Integral de Zonas Costeras - Institut d'Investigació per a la Gestió Integral de Zones Costaneres, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, LabEx UnivEarthS, European Commission, Junta de Andalucía, GENERALITAT VALENCIANA, AGENCIA ESTATAL DE INVESTIGACION, National Science Centre, Polonia, Agencia Estatal de Investigación, Agence Nationale de la Recherche, Francia, Shota Rustaveli National Science Foundation, Ministero dell'Istruzione, dell'Università e della Ricerca, Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona, Ministère de l'Education Nationale, de la Formation professionnelle, de l'Enseignement Supérieur et de la Recherche Scientifique, Marruecos
• Format: Article in Journal/Newspaper
• Language: English
• Published: Springer-Verlag 2022
• Subjects: Neutrino mass ordering; Oscillation parameters; FISICA APLICADA; Orca
• Online Access: http://hdl.handle.net/10251/190905; https://doi.org/10.1140/epjc/s10052-021-09893-0

[EN] The next generation of water Cherenkov neu-trino telescopes in the Mediterranean Sea are under con- struction offshore France (KM3NeT/ORCA) and Sicily (KM3NeT/ARCA). The KM3NeT/ORCA detector features an energy detection threshold which allows to collect atmo- spheric neutrinos to study flavour oscillation. This paper reports the KM3NeT/ORCA sensitivity to this phenomenon. The event reconstruction, selection and classification are described. The sensitivity to determine the neutrino mass ordering was evaluated and found to be 4.4¿ if the true order- ing is normal and 2.3¿ if inverted, after 3 years of data taking. The precision to measure ¿m² and ¿¿¿ were also estimated and found to be 85.10¿¿ eV² and (¿¹.¿ -3.1)¿ for normal neu- trino mass ordering and, 75.10¿¿ eV² and (¿².¿ -7.0)¿ for inverted ordering. Finally, a unitarity test of the leptonic mixing matrix by measuring the rate of tau neutrinos is described. Three years of data taking were found to be sufficient to exclude ¿ The authors acknowledge the financial support of the funding agencies: Agence Nationale de la Recherche (contract ANR-15-CE31-0020), Centre National de la Recherche Scientifique (CNRS), Commission Europeenne (FEDER fund and Marie Curie Program), Institut Universitaire de France (IUF), LabEx UnivEarthS (ANR-10-LABX-0023 and ANR-18-IDEX-0001), Paris Ile-de-France Region, France; Shota Rustaveli National Science Foundation of Georgia (SRNSFG, FR-18-1268), Georgia; Deutsche Forschungsgemeinschaft (DFG), Germany; The General Secretariat of Research and Technology (GSRT), Greece; Istituto Nazionale di Fisica Nucleare (INFN), Ministero dell'Universita e della Ricerca (MIUR), PRIN 2017 program (Grant NAT-NET 2017W4HA7S) Italy; Ministry of Higher Education Scientific Research and Professional Training, ICTP through Grant AF-13, Morocco; Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO), the Netherlands; The National Science Centre, Poland (2015/18/E/ST2/00758); National Authority for Scientific Research (ANCS), Romania; ...