Search for neutron - mirror neutron oscillations in a laboratory experiment with ultracold neutrons
A. P. Serebrov, E. B. Aleksandrov, N. A. Dovator, S. P. Dmitriev, A., K. Fomin, P. Geltenbort, A. G. Kharitonov, I. A. Krasnoschekova, M. S., Lasakov, A. N. Murashkin, G. E. Shmelev, V. E. Varlamov, A. V. Vassiljev, O., M. Zherebtsov, O. Zimmer
TL;DR
This paper reports an experimental search for neutron-mirror neutron oscillations using ultracold neutrons, setting new limits on the oscillation time and exploring mirror magnetic fields, contributing to dark matter research.
Contribution
The study provides the first experimental constraints on neutron-mirror neutron oscillation time and mirror magnetic fields using ultracold neutrons in a laboratory setting.
Findings
Neutron-mirror neutron oscillation time tau_osc >= 448 s (90% C.L.)
No significant mirror magnetic field larger than 100 nT detected
First experimental restriction on mirror magnetic fields in this context
Abstract
Mirror matter is considered as a candidate for dark matter. In connection with this an experimental search for neutron - mirror neutron (nn') transitions has been carried out using storage of ultracold neutrons in a trap with different magnetic fields. As a result, a new limit for the neutron - mirror neutron oscillation time has been obtained, tau_osc >= 448 s (90% C.L.), assuming that there is no mirror magnetic field larger than 100 nT. Besides a first attempt to obtain some restriction for mirror magnetic field has been done.
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