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

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posted on 2023-06-08, 23:39 authored by J M Pendlebury, S Afach, N J Ayres, C A Baker, G Ban, G Bison, K Bodek, M Burghoff, P Geltenbort, K Green, Clark GriffithClark Griffith, M van der Grinten, Z D Grujic, Philip Harris, V Hélaine, P Iaydjiev, S N Ivanov, M Kasprzak, Y Kermaidic, K Kirch, H-C Koch, S Komposch, A Kozela, J Krempel, B Lauss, T Lefort, Y Lemière, D J R May, M Musgrave, O Naviliat-Cuncic, F M Piegsa, G Pignol, P N Prashanth, G Quéméner, M Rawlik, D Rebreyend, J D Richardson, D Ries, S Roccia, D Rozpedzik, A Schnabel, P Schmidt-Wellenburg, N Severijns, D Shiers, J A Thorne, A Weis, O J Winston, E Wursten, J Zejma, G Zsigmond
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 dn=-0.21±1.82×10-26??e?cm, which may be interpreted as a slightly revised upper limit on the magnitude of the EDM of 3.0×10-26??e?cm (90% C.L.) or 3.6×10-26??e?cm (95% C.L.).

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review D

ISSN

1550-7998

Publisher

American Physical Society

Issue

9

Volume

92

Article number

a092003

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2015-12-04

First Open Access (FOA) Date

2015-12-04

First Compliant Deposit (FCD) Date

2015-12-04

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