| Direct experimental limit on Neutron–Mirror-Neutron oscillations (2007) | |||||||
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Abstract | |||||||
| In case a mirror world with a copy of our ordinary particle spectrum would exist, the neutron <i>n</i> and its degenerate partner, the mirror neutron <i>n</i><sup>′</sup>, could potentially mix and undergo <i>n</i><i>n</i><sup>′</sup> oscillations. The interaction of an ordinary magnetic field with the ordinary neutron would lift the degeneracy between the mirror partners, diminish the <i>n</i><sup>′</sup> amplitude in the <i>n</i> wave function and, thus, suppress its observability. We report an experimental comparison of ultracold neutron storage in a trap with and without superimposed magnetic field. No influence of the magnetic field is found and, assuming negligible mirror magnetic fields, a limit on the oscillation time τ<sub><i>n</i><i>n</i><sup>′</sup>>103 s (95% C.L.) is derived. | |||||||
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