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

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, Grujić, Z D, Harris, P G, Hélaine, 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, Lemière, 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 and Zsigmond, G (2015) Revised experimental upper limit on the electric dipole moment of the neutron. Physical Review D, 92. 092003-1-092003-22. ISSN 1550-7998

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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.).

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics > QC0770 Nuclear and particle physics. Atomic energy. Radioactivity > QC0793 Elementary particle physics
Depositing User: Philip Harris
Date Deposited: 04 Dec 2015 08:31
Last Modified: 07 Mar 2017 04:52

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