Feasibility of heavy neutrino mass searches in the EC decay of ⁷Be using superconducting tunnel junctions
The Standard Model (SM) of particle physics has been the benchmark for subatomic studies for more than 50 years. Despite its success in describing nearly all matter, the SM cannot predict some of the fundamental observables in nature, including the masses of the neutrinos. In the SM weak interaction, only ``left-handed'' neutrinos exist. However, ``right-handed'' neutrinos which do not take part in the weak interaction - so-called ``sterile neutrinos'' - may yet exist as extensions to the Standard Model, and have proposed masses significantly heavier than those estimated for the SM neutrinos. ...
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