1. A Revised Experimental Upper Limit on the Electric Dipole Moment of the Neutron
- Author
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Pendlebury, J M, Afach, S, Ayres, N J, Baker, C A, Ban, G, Bison, G, Bodek, K, Burghoff, M, Geltenbort, P, Green, K, Griffith, W C, van der Grinten, M, Grujic, Z D, Harris, P G, Helaine, V, Iaydjiev, P, Ivanov, S N, Kasprzak, M, Kermaidic, Y, Kirch, K, Koch, H-C, Komposch, S, Kozela, A, Krempel, J, Lauss, B, Lefort, T, Lemiere, Y, May, D J R, Musgrave, M, Naviliat-Cuncic, O, Piegsa, F M, Pignol, G, Prashanth, P N, Quéméner, G, Rawlik, M, Rebreyend, D, Richardson, J D, Ries, D, Roccia, S, Rozpedzik, D, Schnabel, A, Schmidt-Wellenburg, P, Severijns, N, Shiers, D, Thorne, J A, Weis, A, Winston, O J, Wursten, E, Zejma, J, Zsigmond, G, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Laue-Langevin (ILL), ILL, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
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Nuclear and High Energy Physics ,Physics - Instrumentation and Detectors ,FOS: Physical sciences ,Magnitude (mathematics) ,01 natural sciences ,Resonance (particle physics) ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,Quantum mechanics ,Paul-Scherrer Institute ,Cesium atom ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Neutron ,Limit (mathematics) ,010306 general physics ,Physics ,Conservation law ,magnetic-moment ,Magnetic moment ,010308 nuclear & particles physics ,Instrumentation and Detectors (physics.ins-det) ,QC0793 ,Atomic-Mercury magnetometer ,Electric dipole moment ,resonance ,Quantum electrodynamics ,Ultracold neutrons ,Particle Physics - Experiment - 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 (UCN); 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 $d_\mathrm{n} = -0.21 \pm 1.82 \times10^{-26}$ $e$cm, which may be interpreted as a slightly revised upper limit on the magnitude of the EDM of $3.0 \times10^{-26}$ $e$cm (90% CL) or $ 3.6 \times10^{-26}$ $e$cm (95% CL). This paper is dedicated by the remaining authors to the memory of Prof. J. Michael Pendlebury., 23 pages, 19 figures. Authorship list changed to put J.M. Pendlebury first. Other very minor edits
- Published
- 2015
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