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Ayres, Nicholas J.; Berezhiani, Zurab; Biondi, Riccardo; Bison, Georg; Bodek, Kazimierz; Bondar, Vira; Chiu, Pin-Jung; Daum, Manfred; Dinani, Reza Tavakoli; Doorenbos, Cornelis B.; Emmenegger, Solange; Kirch, Klaus; Kletzl, Victoria; Krempel, Jochen; Lauss, Bernhard; Pais, Duarte; Rienäcker, Ingo; Ries, Dieter; Rossi, Nicola; Rozpedzik, Dagmara; Schmidt-Wellenburg, Philipp; Tanaka, Kazuo S.; Zejma, Jacek; Ziehl, Nathalie; Zsigmond, Geza
Symmetry (Bandung), 03/2022, Letnik: 14, Številka: 3Journal Article
While the international nEDM collaboration at the Paul Scherrer Institut (PSI) took data in 2017 that covered a considerable fraction of the parameter space of claimed potential signals of hypothetical neutron (n) to mirror-neutron (n′) transitions, it could not test all claimed signal regions at various mirror magnetic fields. Therefore, a new study of n−n′ oscillations using stored ultracold neutrons (UCNs) is underway at PSI, considerably expanding the reach in parameter space of mirror magnetic fields (B′) and oscillation time constants (τnn′). The new apparatus is designed to test for the anomalous loss of stored ultracold neutrons as a function of an applied magnetic field. The experiment is distinguished from its predecessors by its very large storage vessel (1.47 m3), enhancing its statistical sensitivity. In a test experiment in 2020 we have demonstrated the capabilities of our apparatus. However, the full analysis of our recent data is still pending. Based on already demonstrated performance, we will reach sensitivity to oscillation times τnn′/cos(β) well above a hundred seconds, with β being the angle between B′ and the applied magnetic field B. The scan of B will allow the finding or the comprehensive exclusion of potential signals reported in the analysis of previous experiments and suggested to be consistent with neutron to mirror-neutron oscillations.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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