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arXiv · 2302.02717

Probing invisible neutrino decay with KM3NeT-ORCA

KM3NeT Collaboration·S. Aiello·A. Albert·S. Alves Garre·Z. Aly·A. Ambrosone·F. Ameli·M. Andre·M. Anghinolfi·M. Anguita·M. Ardid·S. Ardid·J. Aublin·C. Bagatelas·L. Bailly-Salins·B. Baret·S. Basegmez du Pree·Y. Becherini·M. Bendahman·F. Benfenati·E. Berbee·V. Bertin·S. Biagi·M. Boettcher·M. Bou Cabo·J. Boumaaza·M. Bouta·M. Bouwhuis·C. Bozza·H. Brânzaş·R. Bruijn·J. Brunner·R. Bruno·E. Buis·R. Buompane·J. Busto·B. Caiffi·D. Calvo·S. Campion·A. Capone·F. Carenini·V. Carretero·P. Castaldi·S. Celli·L. Cerisy·M. Chabab·N. Chau·A. Chen·R. Cherkaoui El Moursli·S. Cherubini·V. Chiarella·T. Chiarusi·M. Circella·R. Cocimano·J. A. B. Coelho·A. Coleiro·R. Coniglione·P. Coyle·A. Creusot·A. Cruz·G. Cuttone·R. Dallier·Y. Darras·A. De Benedittis·B. De Martino·V. Decoene·R. Del Burgo·I. Di Palma·A. F. Díaz·D. Diego-Tortosa·C. Distefano·A. Domi·C. Donzaud·D. Dornic·M. Dörr·E. Drakopoulou·D. Drouhin·T. Eberl·A. Eddyamoui·T. van Eeden·M. Eff·D. van Eijk·I. El Bojaddaini·S. El Hedri·A. Enzenhöfer·V. Espinosa·G. Ferrara·M. D. Filipović·F. Filippini·L. A. Fusco·J. Gabriel·T. Gal·J. García Méndez·A. Garcia Soto·F. Garufi·C. Gatius Oliver·N. Geißelbrecht·L. Gialanella·E. Giorgio·A. Girardi
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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 $\nu_3$ 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 $1/\alpha_3=\tau_3/m_3 < 180$~$\mathrm{ps/eV}$ at $90\%$ confidence level, assuming true normal ordering. Finally, the impact of neutrino decay on the precision of KM3NeT/ORCA measurements for $\theta_{23}$, $\Delta m^2_{31}$ 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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KM3NeT Collaboration, S. Aiello, A. Albert, S. Alves Garre, Z. Aly, A. Ambrosone, F. Ameli, M. Andre, M. Anghinolfi, M. Anguita, M. Ardid, S. Ardid, J. Aublin, C. Bagatelas, L. Bailly-Salins, B. Baret, S. Basegmez du Pree, Y. Becherini, M. Bendahman, F. Benfenati, E. Berbee, V. Bertin, S. Biagi, M. Boettcher, M. Bou Cabo, J. Boumaaza, M. Bouta, M. Bouwhuis, C. Bozza, H. Brânzaş, R. Bruijn, J. Brunner, R. Bruno, E. Buis, R. Buompane, J. Busto, B. Caiffi, D. Calvo, S. Campion, A. Capone, F. Carenini, V. Carretero, P. Castaldi, S. Celli, L. Cerisy, M. Chabab, N. Chau, A. Chen, R. Cherkaoui El Moursli, S. Cherubini, V. Chiarella, T. Chiarusi, M. Circella, R. Cocimano, J. A. B. Coelho, A. Coleiro, R. Coniglione, P. Coyle, A. Creusot, A. Cruz, G. Cuttone, R. Dallier, Y. Darras, A. De Benedittis, B. De Martino, V. Decoene, R. Del Burgo, I. Di Palma, A. F. Díaz, D. Diego-Tortosa, C. Distefano, A. Domi, C. Donzaud, D. Dornic, M. Dörr, E. Drakopoulou, D. Drouhin, T. Eberl, A. Eddyamoui, T. van Eeden, M. Eff, D. van Eijk, I. El Bojaddaini, S. El Hedri, A. Enzenhöfer, V. Espinosa, G. Ferrara, M. D. Filipović, F. Filippini, L. A. Fusco, J. Gabriel, T. Gal, J. García Méndez, A. Garcia Soto, F. Garufi, C. Gatius Oliver, N. Geißelbrecht, L. Gialanella, E. Giorgio, A. Girardi. 2023-02-06. Probing invisible neutrino decay with KM3NeT-ORCA. https://doi.org/10.1007/jhep04(2023)090

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