Neutrino telescopes; mass ordering; neutrino

The next generation of water Cherenkov neutrino telescopes in the Mediterranean Sea are under construction offshore France (KM3NeT/ORCA) and Sicily (KM3NeT/ARCA). The KM3NeT/ORCA detector features an energy detection threshold which allows to collect atmospheric 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 4.4σ if the true ordering is normal and 2.3σ if inverted, after 3 years of data taking. The precision to measure Δm322 and θ23 were also estimated and found to be 85.10-6eV2 and (-3.1+1.9)∘ for normal neutrino mass ordering and, 75.10-6eV2 and (-7.0+2.0)∘ 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 [InlineEquation not available: see fulltext.] event rate variations larger than 20% at 3 σ level.

Aiello S., Albert A., Alves Garre S., Aly Z., Ambrosone A., Ameli F., et al. (2022). Determining the neutrino mass ordering and oscillation parameters with KM3NeT/ORCA. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 82(1), 1-16 [10.1140/epjc/s10052-021-09893-0].

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

Benfenati F.;Castaldi P.;Filippini F.;Illuminati G.;Levi G.;Margiotta A.;Spurio M.;Versari F.;
2022

Abstract

The next generation of water Cherenkov neutrino telescopes in the Mediterranean Sea are under construction offshore France (KM3NeT/ORCA) and Sicily (KM3NeT/ARCA). The KM3NeT/ORCA detector features an energy detection threshold which allows to collect atmospheric 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 4.4σ if the true ordering is normal and 2.3σ if inverted, after 3 years of data taking. The precision to measure Δm322 and θ23 were also estimated and found to be 85.10-6eV2 and (-3.1+1.9)∘ for normal neutrino mass ordering and, 75.10-6eV2 and (-7.0+2.0)∘ 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 [InlineEquation not available: see fulltext.] event rate variations larger than 20% at 3 σ level.
2022
Aiello S., Albert A., Alves Garre S., Aly Z., Ambrosone A., Ameli F., et al. (2022). Determining the neutrino mass ordering and oscillation parameters with KM3NeT/ORCA. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 82(1), 1-16 [10.1140/epjc/s10052-021-09893-0].
Aiello S.; Albert A.; Alves Garre S.; Aly Z.; Ambrosone A.; Ameli F.; Andre M.; Androulakis G.; Anghinolfi M.; Anguita M.; Anton G.; Ardid M.; Ardid S...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/852786
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