Neutron to Mirror-Neutron Oscillations in the Presence of Mirror Magnetic Fields

Understand

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.