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Statistical sensitivity of the nEDM apparatus at PSI to n - n' oscillations
Version 2 2023-06-07, 08:22
Version 1 2023-06-07, 06:31
conference contribution
posted on 2023-06-07, 08:22 authored by Christopher Abel, N J Ayres, G Bison, K Bodek, V Bondar, P-J Chiu, M Daum, S Emmenegger, P Flaux, L Ferraris-Bouchez, Clark GriffithClark Griffith, Z D Grujic, N Hild, K Kirch, P A Koss, othersThe neutron and its hypothetical mirror counterpart, a sterile state degenerate in mass, could spontaneously mix in a process much faster than the neutron ß-decay. Two groups have performed a series of experiments in search of neutron - mirror-neutron (n - n')oscillations. They reported no evidence, thereby setting stringent limits on the oscillation time tnn. Later, these data sets have been further analyzed by Berezhiani et al.(2009-2017), and signals, compatible with n - n' oscillations in the presence of mirror magnetic fields, have been reported. The Neutron Electric Dipole Moment Collaboration based at the Paul Scherrer Institute performed a new series of experiments to further test these signals. In this paper, we describe and motivate our choice of run configurations with an optimal filling time of 29 s, storage times of 180 s and 380 s, and applied magnetic fields of 10 µT and 20 µT. The choice of these run configurations ensures a reliable overlap in settings with the previous efforts and also improves the sensitivity to test the signals. We also elaborate on the technique of normalizing the neutron counts, making such a counting experiment at the ultra-cold neutron source at the Paul Scherrer Institute possible. Furthermore, the magnetic field characterization to meet the requirements of this n - n oscillation search is demonstrated. Finally, we show that this effort has a statistical sensitivity to n - n' oscillations comparable to the current leading constraints for B' = 0.
History
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- Published
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- Published version
Journal
EPJ Web of ConferencesISSN
2100-014XPublisher
EDP SciencesExternal DOI
Volume
219Page range
1-9Article number
a07001Event name
PPNS 2018 - International Workshop on Particle Physics at Neutron SourcesEvent location
Grenoble, FranceEvent type
workshopEvent date
24-26 May 2018ISBN
9782759890828Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Experimental Particle Physics Research Group Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2019-05-03First Open Access (FOA) Date
2020-01-02First Compliant Deposit (FCD) Date
2019-04-25Usage metrics
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