Search for neutron–mirror neutron oscillations in a laboratory experiment with ultracold neutrons

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• 作者：A.P. Serebrov ; E.B. Aleks ; rov ; 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
• 关键词：Mirror world ; Neutron oscillations ; Ultracold neutrons
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2009
• 出版时间：1 December 2009-11 December 2009
• 年：2009
• 卷：611
• 期：2-3
• 页码：137-140
• 全文大小：224 K

文摘

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 τ_osc has been obtained, τ_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.