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 θ_23, Delta m^2_ 31and 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 / Aiello, S., Albert, A., Alves Garre, S., Aly, Z., Ambrosone, A., Ameli, F., Andre, M., Anghinolfi, M., Anguita, M., Ardid, M., Ardid, S., Aublin, J., Bagatelas, C., Bailly-Salins, L., Baret, B., Basegmez du Pree, S., Becherini, Y., Bendahman, M., Benfenati, F., Berbee, E., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2023:4(2023). [10.1007/jhep04(2023)090]

Probing invisible neutrino decay with KM3NeT/ORCA

A. Ambrosone;P. Castaldi;B. De Martino;F. Garufi;A. Marinelli;G. Miele;C. M. Mollo;A. Moussa;M. Musumeci;O. Pisanti;B. Spisso;D. Vivolo;
2023

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 θ_23, Delta m^2_ 31and mass ordering have been studied. No significant effect of neutrino decay on the sensitivity to these measurements has been found.
2023
Probing invisible neutrino decay with KM3NeT/ORCA / Aiello, S., Albert, A., Alves Garre, S., Aly, Z., Ambrosone, A., Ameli, F., Andre, M., Anghinolfi, M., Anguita, M., Ardid, M., Ardid, S., Aublin, J., Bagatelas, C., Bailly-Salins, L., Baret, B., Basegmez du Pree, S., Becherini, Y., Bendahman, M., Benfenati, F., Berbee, E., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2023:4(2023). [10.1007/jhep04(2023)090]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/944512
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