Neutron to Mirror-Neutron Oscillations in the Presence of Mirror Magnetic Fields
I. Altarev, C. A. Baker, G. Ban, K. Bodek, M. Daum, P. Fierlinger, P., Geltenbort, K. Green, M. G. D. van der Grinten, E. Gutsmiedl, P. G. Harris,, R. Henneck, M. Horras, P. Iaydjiev, S. Ivanov, N. Khomutov, K. Kirch, S., Kistryn, A. Knecht, P. Knowles, A. Kozela, F. Kuchler
TL;DR
This study used ultracold neutron storage experiments to search for neutron to mirror-neutron oscillations influenced by mirror magnetic fields, setting new lower bounds on oscillation time.
Contribution
It provides the first experimental constraints on neutron to mirror-neutron oscillations considering mirror magnetic fields in the 0 to 12.5 μT range.
Findings
No evidence of nn' oscillations was observed.
Established a lower limit on oscillation time tau_{nn'} > 12.0 s.
Excluded certain parameter spaces for mirror magnetic fields.
Abstract
We performed ultracold neutron (UCN) storage measurements to search for additional losses due to neutron (n) to mirror-neutron (n') oscillations as a function of an applied magnetic field B. In the presence of a mirror magnetic field B', UCN losses would be maximal for B = B'. We did not observe any indication for nn' oscillations and placed a lower limit on the oscillation time of tau_{nn'} > 12.0 s at 95% C.L. for any B' between 0 and 12.5 uT.
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