Speaker
Description
Neutron to mirror-neutron oscillations [1] could be an observable baryon number violating process. Baryon number violation is required for baryogenesis in order to explain the observed asymmetry between matter and antimatter in the universe. Two separate groups [2],[3] performed experiments in search of mirror-neutron oscillations and reported having found no evidence. The limit set on the oscillation time was $\tau_{nn'} > 414~$s (90\% C.L.) at mirror magnetic field $B'=0$. Furthermore, when the results of these two experiments were further analyzed by Berezhiani et al., statistically significant signals for mirror-neutron oscillation in presence of a mirror magnetic field were reported [4]. The current leading constraints upon $\tau_{nn'}$ in Refs. [2],[3],[4],[5],[6],[7] do not exclude these signals [7]. The PSI nEDM collaboration performed a series of experiments to test these signals and the latest results of this effort will be presented.
