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Simultaneous Measurement of Half-Life and Spectral Shape of $^{115}$In $\beta$-decay with an Indium Iodide Cryogenic Calorimeter

Simultaneous Measurement of Half-Life and Spectral Shape of $^{115}$In $\beta$-decay with an Indium Iodide Cryogenic Calorimeter

Current bounds on neutrino Majorana mass are affected by significant uncertainties in the nuclear calculations for neutrinoless double-beta decay. A key issue for a data-driven improvement of the nuclear theory is the actual value of the axial coupling constant $g_A$, which can be investigated through forbidden $\beta$-decays. We present the …