Further search for magnetic-field-induced neutron disappearance in an ultracold neutron beam
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arXiv
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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866912983724064768 |
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| author | Brenot, Gaby Clément, Benoit Filter-Pieler, Hanno Galbinski, Daniel Jenke, Tobias Lefort, Thomas Lejuez, Anthony Pignol, Guillaume Roccia, Stephanie Saenz-Arevalo, William |
| author_facet | Brenot, Gaby Clément, Benoit Filter-Pieler, Hanno Galbinski, Daniel Jenke, Tobias Lefort, Thomas Lejuez, Anthony Pignol, Guillaume Roccia, Stephanie Saenz-Arevalo, William |
| contents | We report the results of the second iteration of an experiment searching for neutron-hidden-neutron oscillations in a beam of ultracold neutrons, conducted at the PF2 facility of the Institut Laue Langevin (ILL). Oscillations were tested via neutron disappearance as a function of an applied magnetic field, in the context of a phenomenological two-parameter model assuming zero hidden potentials. The magnetic field was varied in a step-wise manner in order to resonantly enhance the oscillation probability at different mass splittings ($δm$) across a 60--1550 peV range. No evidence for neutron disappearance is observed and conservative limits on the neutron-hidden-neutron oscillation period ($τ_{nn'}$) have been set at 95 % confidence level: $τ_{nn'} > 200$ms for $|δm| \in [60, 400]$ peV and $τ_{nn'} > 100$ ms for $|δm| \in [400, 1550]$ peV |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_25376 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Further search for magnetic-field-induced neutron disappearance in an ultracold neutron beam Brenot, Gaby Clément, Benoit Filter-Pieler, Hanno Galbinski, Daniel Jenke, Tobias Lefort, Thomas Lejuez, Anthony Pignol, Guillaume Roccia, Stephanie Saenz-Arevalo, William High Energy Physics - Experiment We report the results of the second iteration of an experiment searching for neutron-hidden-neutron oscillations in a beam of ultracold neutrons, conducted at the PF2 facility of the Institut Laue Langevin (ILL). Oscillations were tested via neutron disappearance as a function of an applied magnetic field, in the context of a phenomenological two-parameter model assuming zero hidden potentials. The magnetic field was varied in a step-wise manner in order to resonantly enhance the oscillation probability at different mass splittings ($δm$) across a 60--1550 peV range. No evidence for neutron disappearance is observed and conservative limits on the neutron-hidden-neutron oscillation period ($τ_{nn'}$) have been set at 95 % confidence level: $τ_{nn'} > 200$ms for $|δm| \in [60, 400]$ peV and $τ_{nn'} > 100$ ms for $|δm| \in [400, 1550]$ peV |
| title | Further search for magnetic-field-induced neutron disappearance in an ultracold neutron beam |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2603.25376 |