Improved Upper Limit to the Electric Dipole Moment of the Neutron

Abstract

A neutron-beam magnetic-resonance experiment has been used to measure the electric dipole moment ${\ensuremath{\mu}}_{e}$ of the neutron. Although the results for ${\ensuremath{\mu}}_{e}$ differ from zero by 1.4 times the statistical error, the measurement is best interpreted as setting an upper limit on ${\ensuremath{\mu}}_{e}$ of $|\frac{{\ensuremath{\mu}}_{e}}{e}|<5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}23}$ cm, where $e$ is the charge on the proton.