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Journal Articles Physical Review Letters Year : 2007

Direct experimental limit on neutron-mirror-neutron oscillations

G. Ban
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K. Bodek
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S. Kistryn
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M. Kuzniak
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J. Zejma
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N. Khomutov
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P. Knowles
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M. Rebetez
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A. Weis
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C. Plonka
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M. Daum
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R. Henneck
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S. Heule
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M. Kasprzak
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K. Kirch
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A. Knecht
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A. Mtchedlishvili
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G. Zsigmond
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Abstract

In case a mirror world with a copy of our ordinary particle spectrum would exist, the neutron n and its degenerate partner, the mirror neutron ${\rm n'}$, could potentially mix and undergo ${\rm nn'}$ oscillations. The interaction of an ordinary magnetic field with the ordinary neutron would lift the degeneracy between the mirror partners, diminish the ${\rm n'}$-amplitude in the n-wavefunction 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 a limit on the oscillation time $\tau_{\rm nn'} > 103$ s (95% C.L.) is derived.

Dates and versions

in2p3-00164661 , version 1 (13-01-2010)

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G. Ban, T. Lefort, O. Naviliat-Cuncic, K. Bodek, S. Kistryn, et al.. Direct experimental limit on neutron-mirror-neutron oscillations. Physical Review Letters, 2007, 99, pp.161603. ⟨10.1103/PhysRevLett.99.161603⟩. ⟨in2p3-00164661⟩
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