File:PhysRevLett.122.222503.pdf

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Original file ‎(1,275 × 1,650 pixels, file size: 407 KB, MIME type: application/pdf, 4 pages)

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Constraints on the Dark Matter Interpretation n→χ+e+e− of the Neutron Decay Anomaly with the PERKEO II Experiment

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English: Discrepancies from in-beam- and in-bottle-type experiments measuring the neutron lifetime are on the 4σ 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 n→χ+e+e−. 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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Source

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.222503

https://doi.org/10.1103/PhysRevLett.122.222503
Author M. Klopf, E. Jericha, B. Märkisch, H. Saul, T. Soldner, and H. Abele

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