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Beyond Half-Life Limits: Robust Operator-Level Interpretation of Multi-Isotope Neutrinoless Double-Beta Decay
K. Ishidoshiro
Current and future neutrinoless double-beta decay () searches are usually characterized by half-life limits or projected sensitivities. For operator-level interpretation, how…
Constraints on Fermionic Dark Matter Absorption from Radiochemical Solar-Neutrino Measurements
K. Ishidoshiro, K. Tachibana
We reinterpret classic radiochemical solar-neutrino measurements as ``rate meters'' for additional, non-negative capture-like contributions induced by fermionic dark matter absorpt…
Probing Internal Conversion and Dark-Matter-Induced De-excitation of 180mTa with a gamma-ray TES Array
A. Gando, K. Ichimura, K. Ishidoshiro +5
We propose and evaluate a source-as-detector search for the de-excitation of the long-lived isomer in natural tantalum (Ta), using a -ray transitio…
Supernova-scope for the Direct Search of Supernova Axions
Shao-Feng Ge, Koichi Hamaguchi, Koichi Ichimura +5
If a supernova explosion occurs within a few hundred parsecs from the Earth, a huge number of axions, in addition to neutrinos, may arrive at the Earth. In this paper, we discuss i…