6533b873fe1ef96bd12d4e7f
RESEARCH PRODUCT
A search for neutron to mirror-neutron oscillations using the nEDM apparatus at PSI
Georg BisonT. LefortI. RienäckerI. RienäckerJ. ThorneZoran D. GrujićPrajwal MohanmurthyPrajwal MohanmurthyJ. KrempelA. KozelaPhilipp Schmidt-wellenburgNathal SeverijnsFlorian M. PiegsaKlaus KirchKlaus KirchJacek ZejmaD. RiesC. AbelBernhard LaussM. DaumW. C. GriffithNora HildNora HildOscar Naviliat-cuncicP.-j. ChiuP.-j. ChiuP. A. KossV. BondarP. FlauxL. Ferraris-bouchezD. RozpedzikGeza ZsigmondA. LereddeN. J. AyresS. RocciaM. RawlikM. RawlikChristopher CrawfordKazimierz BodekE. ChanelReza Tavakoli DinaniH. C. KochAntoine WeisG. BanGuillaume PignolD. RebreyendE. WurstenD. PaisD. PaisS. Emmeneggersubject
Nuclear and High Energy PhysicsNeutron electric dipole momentmedia_common.quotation_subjectmagnetic fieldWeak interaction[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]Astronomy & Astrophysics01 natural sciences7. Clean energyAsymmetryrotationPhysics Particles & FieldsELECTRIC-DIPOLE MOMENTweak interaction0103 physical sciencesDark matterDARK-MATTERNeutron010306 general physicsnumerical calculationsmirrorNuclear mattermedia_commonoscillation: timePhysicsn: electric momentProperties of neutrons Ultracold neutrons Nuclear matter Mirror matter Dark matter Particle symmetriesScience & TechnologyProperties of neutronsParticle symmetries010308 nuclear & particles physicsparity: symmetryPhysicsNuclear matter[PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph]lcsh:QC1-999Mirror matterMagnetic fieldMODELPhysics Nuclear[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Physical SciencesUltracold neutronsAtomic physicsUltracold neutronsMirror matterasymmetrylcsh:Physicsdescription
It has been proposed that there could be a mirror copy of the standard model particles, restoring the parity symmetry in the weak interaction on the global level. Oscillations between a neutral standard model particle, such as the neutron, and its mirror counterpart could potentially answer various standing issues in physics today. Astrophysical studies and terrestrial experiments led by ultracold neutron storage measurements have investigated neutron to mirror-neutron oscillations and imposed constraints on the theoretical parameters. Recently, further analysis of these ultracold neutron storage experiments has yielded statistically significant anomalous signals that may be interpreted as neutron to mirror-neutron oscillations, assuming nonzero mirror magnetic fields. The neutron electric dipole moment collaboration performed a dedicated search at the Paul Scherrer Institute and found no evidence of neutron to mirror-neutron oscillations. Thereby, the following new lower limits on the oscillation time were obtained: τnn′>352 s at B′=0 (95% C.L.), τnn′>6s for 0.4μT<B′<25.7μT (95% C.L.), and τnn′/cosβ>9s for 5.0μT<B′<25.4μT (95% C.L.), where β is the fixed angle between the applied magnetic field and the local mirror magnetic field, which is assumed to be bound to the Earth. These new constraints are the best measured so far around B′∼10μT and B′∼20μT.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-01-10 | Physics Letters B |