26-30 July 2021
Europe/Berlin timezone

Measurement of the neutron electric dipole moment in the nEDM and n2EDM experiments

26 Jul 2021, 18:00


Parallel session talk Flavour Physics and CP Violation T08: Flavour Physics and CP Violation


Benoit Clément (LPSC - Université Grenoble Alpes)


The electric dipole moment (EDM) of the neutron is a strong probe of CP violation beyond the Standard Model.
In particular, its value could reveal information on baryogenesis.
We report the latest result from the nEDM collaboration, which operates an experiment to measure the neutron EDM at the Paul Scherrer Institute
using Ramsey’s method of separated oscillating magnetic fields with ultracold neutrons.
The estimation of systematic effects profited from an unprecedented knowledge of the magnetic field relying on the use of both a 199Hg comagnetometer and an array of optically pumped cesium vapor magnetometers
The total uncertainty is dominated by the statistics and the observe EDM is compatible with zero. A new improved limit, |d|<1.8e-26 e.cm @ 90% CL, was computed.
The systematic precision was improved by a factor 5 with respect to previous experiments opening the way to improved sensitivity in the next generation experiment, n2EDM
which is being build at PSI for an operation starting 2022.

Collaboration / Activity nEDM

Primary author

Benoit Clément (LPSC - Université Grenoble Alpes)

Presentation Materials