Constraints on the Dark Matter Interpretation of the Neutron Decay Anomaly with the PERKEO II Experiment
Open Access
- 7 June 2019
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 122 (22), 222503
- https://doi.org/10.1103/physrevlett.122.222503
Abstract
Discrepancies from in-beam- and in-bottle-type experiments measuring the neutron lifetime are on the standard deviation level. In a recent publication Fornal and Grinstein proposed that the puzzle could be solved if the neutron would decay on the one percent level via a dark decay mode, one possible branch being . With data from the Perkeo II experiment we set limits on the branching fraction and exclude a one percent contribution for 95% of the allowed mass range for the dark matter particle.
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Funding Information
- Austrian Science Fund (P 26630-N20, P 26781-N20, I 689-N16)
- Deutsche Forschungsgemeinschaft (AB 128/5-2, MA 4944/1-2)
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