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Searching for Hidden Neutrons with a Reactor Neutrino Experiment: Constraints from the STEREO Experiment

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Almazan,  Helena
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Bonhomme,  A.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Buck,  C.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Citation

Almazan, H., Bernard, L., Blanchet, A., Bonhomme, A., Buck, C., Sanchez, P. d. A., et al. (2022). Searching for Hidden Neutrons with a Reactor Neutrino Experiment: Constraints from the STEREO Experiment. Physical Review Letters, 128(6): 061801. doi:10.1103/PhysRevLett.128.061801.


Cite as: https://hdl.handle.net/21.11116/0000-000A-E17F-A
Abstract
Different extensions of the standard model of particle physics, such as braneworld or mirror matter models, predict the existence of a neutron sterile state, possibly as a dark matter candidate. This Letter reports a new experimental constraint on the probability p for neutron conversion into a hidden neutron, set by the STEREO experiment at the high flux reactor of the Institut Laue-Langevin. The limit is p < 3.1 x 10-11 at 95% C.L. improving the previous limit by a factor of 13. This result demonstrates that short-baseline neutrino experiments can be used as competitive passing-through-walls neutron experiments to search for hidden neutrons.