Searching for beyond the Standard Model physics using the improved description of 100Mo 2𝜈𝛽𝛽 decay spectral shape with CUPID-Mo
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10052_2024_Article_13286.pdf
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Author(s)
Augier, C.
Barabash, A. S.
Bellini, F.
Benato, G.
Beretta, M.
Bergé, L.
Billard, J.
Borovlev, Yu. A.
Cardani, L.
Casali, N.
Date Issued
September 13, 2024
Journal
The European Physical Journal C
Publisher
Springer Berlin Heidelberg
Citation
Augier, C., Barabash, A.S., Bellini, F. et al. Searching for beyond the Standard Model physics using the improved description of 100Mo 2𝜈𝛽𝛽 decay spectral shape with CUPID-Mo. Eur. Phys. J. C 84, 925 (2024).
Version
Final published version
Abstract
The current experiments searching for neutrinoless double-𝛽
(0𝜈𝛽𝛽
) decay also collect large statistics of Standard Model allowed two-neutrino double-𝛽
(2𝜈𝛽𝛽
) decay events. These can be used to search for Beyond Standard Model (BSM) physics via 2𝜈𝛽𝛽
decay spectral distortions. 100Mo has a natural advantage due to its relatively short half-life, allowing higher 2𝜈𝛽𝛽
decay statistics at equal exposures compared to the other isotopes. We demonstrate the potential of the dual read-out bolometric technique exploiting a 100Mo exposure of 1.47 kg ×
years, acquired in the CUPID-Mo experiment at the Modane underground laboratory (France). We set limits on 0𝜈𝛽𝛽
decays with the emission of one or more Majorons, on 2𝜈𝛽𝛽
decay with Lorentz violation, and 2𝜈𝛽𝛽
decay with a sterile neutrino emission. In this analysis, we investigate the systematic uncertainty induced by modeling the 2𝜈𝛽𝛽
decay spectral shape parameterized through an improved model, an effect never considered before. This work motivates searches for BSM processes in the upcoming CUPID experiment, which will collect the largest amount of 2𝜈𝛽𝛽
decay events among the next-generation experiments.
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-024-13286-4
