Speaker
Description
on behalf of the nEDM collaboration
Understanding the spin-precession behavior of ultracold neutrons and cohabiting mercury atoms in a magnetic field is essential for the neutron EDM analysis. In this work, we present an improved determination of the neutron-to-mercury gyromagnetic ratio using the n2EDM apparatus at PSI. A global-fit method is applied to investigate gravitational frequency shifts, the effect of Earth's rotation, and parameters characterizing the neutron energy spectrum. This measurement provides a sensitive cross-check of the neutron spectrum models and can serve as a rapid diagnostic for monitoring temporal neutron spectrum changes. This study improves the understanding of zero-electric-field frequency shifts relevant to the extraction
of the neutron EDM.