Speaker
Description
The search for heavy neutrino mass-states is among the brightest possibilities in our quest for the microscopic nature of dark matter. One of the most powerful methods for such searches is momentum reconstruction in electron-capture (EC) nuclear decay, where the final state only contains the neutrino and the recoiling daughter atom. This approach is advantageous since it relies only on the existence of a heavy neutrino admixture to the active neutrinos, and not on the model-dependent details of their interactions. Here, we report the first measurements in the Beryllium EC STJ (BeEST) experimental program, which uses the decay-momentum reconstruction technique to precisely measure the $^7$Be$\rightarrow ^7$Li recoil spectrum via $^7$Be ions implanted into sensitive superconducting tunnel junction (STJ) radiation detectors.
Mini-abstract
The BeEST: Searching for keV-scale neutrinos using superconducting quantum sensors
| Experiment/Collaboration | The BeEST Collaboration |
|---|