New Experimental Limit on the Electric Dipole Moment of the Neutron

1999/02/01 by Philip Harris, C.A. Baker, K. Green +8 · 25 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Dark Matter and Cosmic Phenomena #Quantum, superfluid, helium dynamics

paper · pdf · doi:10.1103/physrevlett.82.904

openalex publication_date 1999/02/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/26

Abstract

The latest neutron electric dipole moment (EDM) experiment has been collecting data at the Institut Laue-Langevin (ILL), Grenoble, since 1996. It uses an atomic-mercury magnetometer to compensate for the magnetic field fluctuations that were the principal source of systematic errors in previous experiments. The first results, in combination with the previous ILL measurement, yield a possible range of values of (\ensuremath-7.0<d_n<5.0)\ifmmode×\else\texttimes\fi10^\ensuremath-26ecm ( 90% C.L.). This may be interpreted as an upper limit on the absolute value of the neutron EDM of |d_n|<6.3\ifmmode×\else\texttimes\fi10^\ensuremath-26ecm ( 90% C.L.).

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