/ Experiment-Nucl arXiv:0705.2336


A Direct experimental limit on neutron: Mirror neutron oscillations


Ban, G. (ENSICAEN) ; Lefort, T. (ENSICAEN) ; Naviliat-Cuncic, O. (ENSICAEN) ; Bodek, K. (Jagiellonian U.) ; Kistryn, S. (Jagiellonian U.) ; Kuzniak, M. (Jagiellonian U.) ; Zejma, J. (Jagiellonian U.) ; Khomutov, N. (Dubna, JINR) ; Knowles, P. (Fribourg U.) ; Rebetez, M. (Fribourg U.) ; Weis, A. (Fribourg U.) ; Plonka, C. (Laue-Langevin Inst.) ; Rogel, G. (Laue-Langevin Inst.) ; Quemener, G. (LPSC, Grenoble) ; Rebreyend, D. (LPSC, Grenoble) ; S.Roccia, T (LPSC, Grenoble) ; Tur, M. (LPSC, Grenoble) ; Daum, M. (PSI, Villigen) ; Henneck, R. (PSI, Villigen) ; Heule, S. (PSI, Villigen) ; Kasprzak, M. (PSI, Villigen) ; Kirch, K. (PSI, Villigen) ; Knecht, A. (PSI, Villigen) ; Mtchedlishvili, A. (PSI, Villigen) ; Zsigmond, G. (PSI, Villigen)

Published in: Phys.Rev.Lett.
Year: 2007
Vol.: 99
Page No: 161603
Pages: 4

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.

Web-Page: http://pdglive.lbl.gov/REFERENCE_info1.brl?slacrpp=PRLTA,99,161603

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