In the era of precision measurements of the neutrino oscillation parameters, upcoming neutrino experiments will also be sensitive to physics beyond the Standard Model. KM3NeT/ORCA is a neutrino detector optimised for measuring atmospheric neutrinos from a few GeV to around 100 GeV. In this paper, the sensitivity of the KM3NeT/ORCA detector to neutrino decay has been explored. A three-flavour neutrino oscillation scenario, where the third neutrino mass state ν3 decays into an invisible state, e.g. a sterile neutrino, is considered. We find that KM3NeT/ORCA would be sensitive to invisible neutrino decays with 1/α3 = τ3/m3 < 180 ps/eV at 90% confidence level, assuming true normal ordering. Finally, the impact of neutrino decay on the precision of KM3NeT/ORCA measurements for θ23, $$ \Delta {m}_{31}^2 $$and mass ordering have been studied. No significant effect of neutrino decay on the sensitivity to these measurements has been found.

Probing invisible neutrino decay with KM3NeT/ORCA

Bozza, C.
Membro del Collaboration Group
;
Fusco, L. A.
Membro del Collaboration Group
;
Poirè, C.;Stellacci, S. M.
Membro del Collaboration Group
;
2023-01-01

Abstract

In the era of precision measurements of the neutrino oscillation parameters, upcoming neutrino experiments will also be sensitive to physics beyond the Standard Model. KM3NeT/ORCA is a neutrino detector optimised for measuring atmospheric neutrinos from a few GeV to around 100 GeV. In this paper, the sensitivity of the KM3NeT/ORCA detector to neutrino decay has been explored. A three-flavour neutrino oscillation scenario, where the third neutrino mass state ν3 decays into an invisible state, e.g. a sterile neutrino, is considered. We find that KM3NeT/ORCA would be sensitive to invisible neutrino decays with 1/α3 = τ3/m3 < 180 ps/eV at 90% confidence level, assuming true normal ordering. Finally, the impact of neutrino decay on the precision of KM3NeT/ORCA measurements for θ23, $$ \Delta {m}_{31}^2 $$and mass ordering have been studied. No significant effect of neutrino decay on the sensitivity to these measurements has been found.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4824575
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