Nuclear matrix elements and phase-space factors are computed for 2ν and 0ν positron-emitting double-beta modes in three isotopes, yielding sensitivity to SMEFT lepton-number-violating operators at 1-100 TeV and showing multi-isotope measurements can break degeneracies.
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Tracking detectors achieve 1σ mechanism discrimination in neutrinoless double-beta decay with a few events and 3σ with roughly 10 events, rising to about 25 events under realistic reconstruction uncertainties.
citing papers explorer
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Positron-Emitting and Electron-Capturing Double-Beta Processes in the Standard Model and Beyond
Nuclear matrix elements and phase-space factors are computed for 2ν and 0ν positron-emitting double-beta modes in three isotopes, yielding sensitivity to SMEFT lepton-number-violating operators at 1-100 TeV and showing multi-isotope measurements can break degeneracies.
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Statistical sensitivity of neutrinoless double-beta decay exchange mechanism discrimination by tracking experiments
Tracking detectors achieve 1σ mechanism discrimination in neutrinoless double-beta decay with a few events and 3σ with roughly 10 events, rising to about 25 events under realistic reconstruction uncertainties.