Experimental search for neutron - mirror neutron oscillations using storage of ultracold neutrons

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dc.creatorSerebrov, A. P.
dc.creatorAleksandrov, E. B.
dc.creatorDovator, N. A.
dc.creatorDmitriev, S. P.
dc.creatorFomin, A. K.
dc.creatorGeltenbort, P.
dc.creatorKharitonov, A. G.
dc.creatorKrasnoschekova, I. A.
dc.creatorLasakov, M. S.
dc.creatorMurashkin, A. N.
dc.creatorShmelev, G. E.
dc.creatorVarlamov, V. E.
dc.creatorVassiljev, A. V.
dc.creatorZherebtsov, O. M.
dc.creatorZimmer, O.
dc.date2007-06-25
dc.date.accessioned2026-07-07T11:41:21Z
dc.date.available2026-07-07T11:41:21Z
dc.descriptionThe idea of a hidden sector of mirror partners of elementary particles has attracted considerable interest as a possible candidate for dark matter. Recently it was pointed out by Berezhiani and Bento that the present experimental data cannot exclude the possibility of a rapid oscillation of the neutron n to a mirror neutron n' with oscillation time much smaller than the neutron lifetime. A dedicated search for vacuum transitions n->n' has to be performed at weak magnetic field, where both states are degenerate. We report the result of our experiment, which compares rates of ultracold neutrons after storage at a weak magnetic field well below 20 nT and at a magnetic field strong enough to suppress the seeked transitions. We obtain a new limit for the oscillation time of n-n' transitions, tau_osc (90% C.L.) > 414 s. The corresponding limit for the mixing energy of the normal and mirror neutron states is delta_m (90% C.L.) < 1.5x10-18 eV.
dc.description16 pages, 8 figures, 2 tables
dc.identifierhttps://arxiv.org/abs/0706.3600
dc.identifierhttp://arxiv.org/abs/0706.3600
dc.identifierPhys.Lett.B663:181-185,2008
dc.identifierdoi:10.1016/j.physletb.2008.04.014
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200503
dc.subjectNuclear Experiment
dc.titleExperimental search for neutron - mirror neutron oscillations using storage of ultracold neutrons
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