Revised experimental upper limit on the electric dipole moment of the neutron

Citations Over TimeTop 1% of 2015 papers

Abstract

We present for the first time a detailed and comprehensive analysis of the experimental results that set the current world sensitivity limit on the magnitude of the electric dipole moment (EDM) of the neutron. We have extended and enhanced our earlier analysis to include recent developments in the understanding of the effects of gravity in depolarizing ultracold neutrons; an improved calculation of the spectrum of the neutrons; and conservative estimates of other possible systematic errors, which are also shown to be consistent with more recent measurements undertaken with the apparatus. We obtain a net result of ${d}_{\mathrm{n}}=\ensuremath{-}0.21\ifmmode\pm\else\textpm\fi{}1.82\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}26}\text{ }\text{ }e\text{ }\mathrm{cm}$, which may be interpreted as a slightly revised upper limit on the magnitude of the EDM of $3.0\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}26}\text{ }\text{ }e\text{ }\mathrm{cm}$ (90% C.L.) or $3.6\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}26}\text{ }\text{ }e\text{ }\mathrm{cm}$ (95% C.L.).

Related Papers

• → New measurement of the electric dipole moment of the neutron(1992)201 cited
• A proposed method of measuring the electric-dipole moment of the neutron by ultracold neutron interferometry(1989)
• → The search for the neutron electric dipole moment at PSI(2021)