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, Bondar, V, Burghoff, M, Chanel, E, Chowdhuri, Z, Chiu, P-J, Clement, B, Crawford, C B, Daum, M, Emmenegger, S, Ferraris-Bouchez, L, Fertl, M, Flaux, P, Franke, B, Fratangelo, A, Geltenbort, P, Green, K, Griffith, W C, van der Grinten, M, Grujić, Z D, Harris, P G, Hayen, L, Heil, W, Henneck, R, Hélaine, V, Hild, N, Hodge, Z, Horras, M, Iaydjiev, P, Ivanov, S N, Kasprzak, M, Kermaidic, Y, Kirch, K, Knecht, A, Knowles, P, Koch, H-C, Koss, P A, 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, Quéméner, G, Rawlik, M, Rebreyend, D, Rienäcker, I, Ries, D, Roccia, S, Rogel, G, Rozpedzik, D, Schnabel, A, Schmidt-Wellenburg, P, Severijns, N, Shiers, D, Dinani, R Tavakoli, Thorne, J A, Virot, R, Voigt, J, Weis, A, Wursten, E, Wyszynski, G, Zejma, J, Zenner, J and Zsigmond, G (2020) Measurement of the permanent electric dipole moment of the neutron. Physical Review Letters, 124 (8). 081803-1-081803-7. ISSN 1079-7114

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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 (UCN). 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 Hg-199 co-magnetometer 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 measured value of the neutron EDM is $d_{\rm n} = (0.0\pm1.1_{\rm stat}\pm0.2_{\rmsys})\times10^{-26}e\,{\rm cm}$.

Item Type: Article
Keywords: hep-ex;hep-ex;nucl-ex;physics.ins-det
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 10 Apr 2020 14:03
Last Modified: 10 Apr 2020 14:15
URI: http://sro.sussex.ac.uk/id/eprint/90353

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