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Limits on the Existence of sub-MeV Sterile Neutrinos from the Decay of $^7$Be in Superconducting Quantum Sensors

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arxiv 2010.09603 v1 pith:3Z7MIGGZ submitted 2020-10-19 nucl-ex hep-exquant-ph

classification nucl-exhep-exquant-ph
keywords neutrinossteriledecayexistenceexperimentlimitsquantumsensors
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abstract

Sterile neutrinos are natural extensions to the standard model of particle physics and provide a possible portal to the dark sector. We report a new search for the existence of sub-MeV sterile neutrinos using the decay-momentum reconstruction technique in the decay of $^7$Be. The experiment measures the total energy of the $^7$Li daughter atom from the electron capture decay of $^7$Be implanted into sensitive superconducting tunnel junction (STJ) quantum sensors. This first experiment presents data from a single STJ operated at a low count rate for a net total of 28 days, and provides exclusion limits on sterile neutrinos in the mass range from 100 to 850 keV that improve upon previous work by up to an order of magnitude.

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Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Two Micron-Size Dark Dimensions

    hep-th 2025-01 conditional novelty 5.0 of 10

    Two micron-size dark dimensions are consistent with observations only if the compact space has no isometries and the normalcy temperature is fine-tuned to about 2 MeV.

  2. Future directions in nuclear $\beta$ decay at FRIB and beyond

    nucl-th 2026-07 unverdicted

    A community white paper summarizing the current state and future directions of nuclear beta-decay studies at FRIB, with no new quantitative result.

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