We present the first search for the Majoron-emitting modes of the neutrinoless double β decay (0νββχ0) using scintillating cryogenic calorimeters. We analyzed the CUPID-0 Phase I data using a Bayesian approach to reconstruct the background sources activities, and evaluate the potential contribution of the Se82 0νββχ0. We considered several possible theoretical models which predict the existence of a Majoron-like boson coupling to the neutrino. The energy spectra arising from the emission of such bosons in the neutrinoless double β decay have spectral indices n=1, 2, 3, or 7. We found no evidence of any of these decay modes, setting a lower limit (90% of credibility interval) on the half-life of 1.2×1023 yr in the case of n=1, 3.8×1022 yr for n=2, 1.4×1022 yr for n=3 and 2.2×1021 yr for n=7. These are the best limits on the 0νββχ0 half-life of the Se82, and demonstrate the potentiality of the CUPID-0 technology in this field.

Azzolini, O., Beeman, J., Bellini, F., Beretta, M., Biassoni, M., Brofferio, C., et al. (2023). Search for Majoron-like particles with CUPID-0. PHYSICAL REVIEW D, 107(3) [10.1103/PhysRevD.107.032006].

Search for Majoron-like particles with CUPID-0

M. Beretta;M. Biassoni;C. Brofferio;S. Capelli;P. Carniti;D. Chiesa;M. Clemenza;O. Cremonesi;L. Gironi;C. Gotti;M. Nastasi;L. Pattavina;M. Pavan;G. Pessina;S. Pozzi;E. Previtali;
2023

Abstract

We present the first search for the Majoron-emitting modes of the neutrinoless double β decay (0νββχ0) using scintillating cryogenic calorimeters. We analyzed the CUPID-0 Phase I data using a Bayesian approach to reconstruct the background sources activities, and evaluate the potential contribution of the Se82 0νββχ0. We considered several possible theoretical models which predict the existence of a Majoron-like boson coupling to the neutrino. The energy spectra arising from the emission of such bosons in the neutrinoless double β decay have spectral indices n=1, 2, 3, or 7. We found no evidence of any of these decay modes, setting a lower limit (90% of credibility interval) on the half-life of 1.2×1023 yr in the case of n=1, 3.8×1022 yr for n=2, 1.4×1022 yr for n=3 and 2.2×1021 yr for n=7. These are the best limits on the 0νββχ0 half-life of the Se82, and demonstrate the potentiality of the CUPID-0 technology in this field.
Articolo in rivista - Articolo scientifico
neutrino; Majoron; double beta decay; cryogenic calorimeters; scintillation
English
16-feb-2023
2023
107
3
032006
none
Azzolini, O., Beeman, J., Bellini, F., Beretta, M., Biassoni, M., Brofferio, C., et al. (2023). Search for Majoron-like particles with CUPID-0. PHYSICAL REVIEW D, 107(3) [10.1103/PhysRevD.107.032006].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/409996
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