Measurement of the Permanent Electric Dipole Moment of the Neutron

Abel, C.; Afach, S.; Ayres, N. J.; Baker, C.A.; Ban, G.; Bison, G.; Bodek, K.; Бондар, В. М.; Burghoff, M.; Chanel, E.; Chowdhuri, Z.; Chiu, P.-J.; Clément, B.; Crawford, Christopher; Daum, M.; Emmenegger, S.; Ferraris-Bouchez, L.; Fertl, M.; Flaux, P.; Franke, B.; Fratangelo, Anastasio; Geltenbort, P.; Green, K.; Griffith, W. C.; Grinten, M. van der; Grujić, Z. D.; Harris, Philip; Hayen, L.; Heil, W.; Henneck, R.; Hélaine, V.; Hild, Nora; Hodge, Z.; Horras, M.; Iaydjiev, P.; Иванов, С. Н.; Kasprzak, M.; Kermaïdic, Y.; Kirch, K.; Knecht, A.; Knowles, P.; Koch, H.-C.; Koss, P.; Komposch, S.; Kozela, A.; Kraft, A.; Krempel, J.; Kuźniak, M.; Lauss, B.; Lefort, T.; Lemière, Y.; Leredde, A.; Mohanmurthy, P.; Mtchedlishvili, A.; Musgrave, M.; Naviliat-Cuncic, O.; Pais, D.; Piegsa, F. M.; Pierre, E.; Pignol, G.; Plonka-Spehr, C.; Prashanth, P. N.; Qúeḿener, G.; Rawlik, M.; Rebreyend, D.; Rienäcker, I.; Ries, D.; Roccia, S.; Rogel, G.; Rozpędzik, D.; Schnabel, A.; Schmidt-Wellenburg, P.; Severijns, N.; Shiers, D.; Dinani, R. Tavakoli; Thorne, Jacob; Virot, R.; Voigt, Jens; Weis, A.; Wursten, E.; Wyszynski, G.; Zejma, J.; Zenner, J.; Zsigmond, G.

doi:10.1103/physrevlett.124.081803

articlePhysical Review LettersFeb 28, 2020HYBRID OA

Measurement of the Permanent Electric Dipole Moment of the Neutron

CAC. Abel SAS. Afach NJN. J. Ayres CBC.A. Baker GBG. Ban

University of Sussex · Paul Scherrer Institute · +22 more institutions

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Abstract

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…

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Keywords

Ultracold neutrons
Neutron electric dipole moment
Magnetometer
Neutron
Physics
Electric dipole moment
Dipole
Magnetic dipole

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