Status of the SuperNEMO Demonstrator and Analysis of First Data
X.Β Aguerre* and Β On behalf of the SuperNemo Collaboration
*: corresponding author
Full text: pdf
Pre-published on: December 17, 2024
Published on: April 29, 2025
Abstract
SuperNEMO is searching for the hypothesised lepton-number-violating neutrinoless double-beta decay 0πœˆπ›½π›½ process. Our unique NEMO-3-style tracker-calorimeter detector tracks individual particle trajectories and energies. This enables powerful background rejection and detailed studies of Standard Model 2πœˆπ›½π›½ decay. By studying electron and photon energies and relative trajectories, SuperNEMO will investigate nuclear processes hidden to other technologies, such as decays to
excited nuclear states, and will constrain the axial coupling constant, g$_A$. By precisely measuring 2πœˆπ›½π›½ observables we will seek beyond-the-Standard-Model effects like exotic 0πœˆπ›½π›½ modes,
Lorentz-violating decays and bosonic neutrino processes. The SuperNEMO Demonstrator at LSM, France has a 6.1 kg $^{82}$Se 𝛽𝛽 source, and is taking background data vital to isolate future signals. It is calibrated with a $^{207}$Bi source deployment system. Multi-layer shielding, now in construction, will allow 𝛽𝛽 data-taking in 2024.
DOI: https://doi.org/10.22323/1.476.0123
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