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Almazán, H; Bernard, L; Blanchet, A; Bonhomme, A; Buck, C; Del Amo Sanchez, P; El Atmani, I; Labit, L; Lamblin, J; Letourneau, A; Lhuillier, D; Licciardi, M; Lindner, M; Materna, T; Méplan, O; Pessard, H; Pignol, G; Réal, J-S; Ricol, J-S; Roca, C; Rogly, R; Salagnac, T; Sarrazin, M; Savu, V; Schoppmann, S; Soldner, T; Stutz, A; Vialat, M
Physical review letters, 02/2022, Letnik: 128, Številka: 6Journal Article
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<3.1×10^{-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.
