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

Pendlebury, JM; Afach, S; Ayres, NJ; Baker, CA; Ban, G; Bison, G; Bodek, K; Burghoff, M; Geltenbort, P; Green, K; Griffith, WC; van der Grinten, M; Grujic, ZD; Harris, PG; Helaine, V; Iaydjiev, P; Ivanov, SN; Kasprzak, Malgorzata; Kermaidic, Y; Kirch, K; Koch, H-C; Komposch, S; Kozela, A; Krempel, J; Lauss, B; Lefort, T; Lemiere, Y; May, DJR; Musgrave, M; Naviliat-Cuncic, O; Piegsa, FM; Pignol, G; Prashanth, PN; Quemener, G; Rawlik, M; Rebreyend, D; Richardson, JD; Ries, D; Roccia, S; Rozpedzik, D; Schnabel, A; Schmidt-Wellenburg, P; Severijns, Nathal; Shiers, D; Thorne, JA; Weis, A; Winston, OJ; Wursten, Elise; Zejma, J; Zsigmond, G

doi:10.1103/PhysRevD.92.092003

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

Author:

Pendlebury, JM

Afach, S ; Ayres, NJ ; Baker, CA ; Ban, G ; Bison, G ; Bodek, K ; Burghoff, M ; Geltenbort, P ; Green, K ; Griffith, WC ; van der Grinten, M ; Grujic, ZD ; Harris, PG ; Helaine, V ; Iaydjiev, P ; Ivanov, SN ; Kasprzak, Malgorzata ; Kermaidic, Y ; Kirch, K ; Koch, H-C ; Komposch, S ; Kozela, A ; Krempel, J ; Lauss, B ; Lefort, T ; Lemiere, Y ; May, DJR ; Musgrave, M ; Naviliat-Cuncic, O ; Piegsa, FM ; Pignol, G ; Prashanth, PN ; Quemener, G ; Rawlik, M ; Rebreyend, D ; Richardson, JD ; Ries, D ; Roccia, S ; Rozpedzik, D ; Schnabel, A ; Schmidt-Wellenburg, P ; Severijns, Nathal ; Shiers, D ; Thorne, JA ; Weis, A ; Winston, OJ ; Wursten, Elise ; Zejma, J ; Zsigmond, G

Keywords:

Science & Technology, Physical Sciences, Astronomy & Astrophysics, Physics, Particles & Fields, Physics, CESIUM ATOM, RESONANCE, hep-ex, physics.ins-det, 0201 Astronomical and Space Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, 0206 Quantum Physics, Nuclear & Particles Physics, 4902 Mathematical physics, 5101 Astronomical sciences, 5107 Particle and high energy physics

Abstract:

© 2015 American Physical Society. 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.).