Revised experimental upper limit on the electric dipole moment of the neutron
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Open Access
- 4 November 2015
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 92 (9), 092003
- https://doi.org/10.1103/physrevd.92.092003
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 , which may be interpreted as a slightly revised upper limit on the magnitude of the EDM of (90% C.L.) or (95% C.L.).
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Funding Information
- Science and Technology Facilities Council (ST/K001329/1, ST/M003426/1, ST/L006472/1)
- Fonds De La Recherche Scientifique - FNRS (GO A/2010/10)
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (200020-144473, 200021-126562, 200020-149211, 200020-140421)
- Agence Nationale de la Recherche (ANR-09-BLAN-0046)
- Narodowe Centrum Nauki (UMO-2012/04/M/ST2/00556)
- Fonds Wetenschappelijk Onderzoek
- Villum Fonden
- Paul Scherrer Institut
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