2020 journal article

Measurement of the Permanent Electric Dipole Moment of the Neutron

PHYSICAL REVIEW LETTERS, 124(8).

By: C. Abel*, S. Afach*, N. Ayres*, C. Baker*, G. Ban*, G. Bison*, K. Bodek*, V. Bondar ...

co-author countries: Belgium 🇧🇪 Switzerland 🇨🇭 Germany 🇩🇪 France 🇫🇷 United Kingdom of Great Britain and Northern Ireland 🇬🇧 Poland 🇵🇱 Serbia 🇷🇸 United States of America 🇺🇸
Source: Web Of Science
Added: March 23, 2020

We present the result of an experiment to measure the electric dipole moment (EDM) of the neutron at the Paul Scherrer Institute using Ramsey's method of separated oscillating magnetic fields with ultracold neutrons. Our measurement stands in the long history of EDM experiments probing physics violating time-reversal invariance. The salient features of this experiment were the use of a ^{199}Hg comagnetometer and an array of optically pumped cesium vapor magnetometers to cancel and correct for magnetic-field changes. The statistical analysis was performed on blinded datasets by two separate groups, while the estimation of systematic effects profited from an unprecedented knowledge of the magnetic field. The measured value of the neutron EDM is d_{n}=(0.0±1.1_{stat}±0.2_{sys})×10^{-26} e.cm.