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The search for the neutron electric dipole moment at the Paul Scherrer Institute

Baker, C.A. ; Ban, G. ; Bodek, K. ; Burghoff, M. ; Chowdhuri, Z. ; Daum, M. ; Fertl, M. ; Franke, B. ; Geltenbort, P. ; Green, K. ; Grinten, M.G.D. van der ; Gutsmiedl, E. ; Harris, P.G. ; Henneck, R. ; Iaydjiev, P. ; Ivanov, S.N. ; Khomutov, N. ; Kasprzak, Malgorzata ; Kirch, K. ; Kistryn, S. ; Knappe-Gr̈uneberg, S. ; Knecht, A. ; Knowles, Paul E. ; Kozela, A. ; Lauss, B. ; Lefort, T. ; Lemière, Y. ; Naviliat-Cuncic, O. ; Pendlebury, J.M. ; Pierre, E. ; Piegsa, F.M. ; Pignol, G. ; Quéméner, G. ; Roccia, S. ; Schmidt-Wellenburg, P. ; Shiers, D. ; Smith, K.F. ; Schnabel, A. ; Trahms, L. ; Weis, Antoine ; Zejma, J. ; Zenner, J. ; Zsigmond, G.

In: Physics Procedia, 2011, vol. 17, p. 159-167

The measurement of the neutron electric dipole moment (nEDM) constrains the contribution of CP-violating terms within both the Standard Model and its extensions. The experiment uses ultracold neutrons (UCN) stored in vacuum at room temperature. This technique provided the last (and best) limit by the RAL/Sussex/ILL collaboration in 2006: dn < 2:9 × 10⁻²⁶ e cm (90% C.L.). We aim to improve...

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Towards a new measurement of the neutron electric dipole moment

Altarev, I. ; Ban, G. ; Bison, Georg ; Bodek, K. ; Burghoff, M. ; Cvijovic, Milan ; Daum, M. ; Fierlinger, P. ; Gutsmiedl, E. ; Hampel, G. ; Heil, W. ; Henneck, R. ; Horras, M. ; Khomutov, N. ; Kirch, K. ; Kistryn, S. ; Knappe-Grüneberg, S. ; Knecht, A. ; Knowles, Paul E. ; Kozela, A. ; Kratz, J. V. ; Kuchler, F. ; Kuźniak, M. ; Lauer, T. ; Lauss, B. ; Lefort, T. ; Mtchedlishvili, A. ; Naviliat-Cuncic, O. ; Paul, S. ; Pazgalev, Anatoly S. ; Petzoldt, G. ; Pierre, E. ; Plonka-Spehr, C. ; Quéméner, G. ; Rebreyend, D. ; Roccia, S. ; Rogel, G. ; Sander-Thoemmes, T. ; Schnabel, A. ; Severijns, N. ; Sobolev, Yu. ; Stoepler, R. ; Trahms, L. ; Weis, Antoine ; Wiehl, N. ; Zejma, J. ; Zsigmond, G.

In: Nuclear Instruments and Methods in Physics Research Section A, 2009, p. -

The effort towards a new measurement of the neutron electric dipole moment (nEDM) at the Paul Scherrer Institut's (PSI) new high intensity source of ultracold neutrons (UCN) is described. The experimental technique relies on Ramsey's method of separated oscillatory fields, using UCN in vacuum with the apparatus at ambient temperature. In the first phase, R&D towards the upgrade of the...

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Additional results from the first dedicated search for neutron–mirror–neutron oscillations

Bodek, K. ; Kistryn, S. ; Kuźniak, M. ; Zejma, J. ; Burghoff, M. ; Knappe-Grüneberg, S. ; Sander-Thoemmes, T. ; Schnabel, A. ; Trahms, L. ; Ban, G. ; Lefort, T. ; Naviliat-Cuncic, O. ; Khomutov, N. ; Knowles, Paul E. ; Pazgalev, Anatoly S. ; Weis, Antoine ; Rogel, G. ; Quéméner, G. ; Rebreyend, D. ; Roccia, S. ; Bison, Georg ; Severijns, N. ; Eberhardt, K. ; Hampel, G. ; Heil, W. ; Kratz, J.V. ; Lauer, T. ; Plonka-Spehr, C. ; Sobolev, Yu. ; Wiehl, N. ; Altarev, I. ; Fierlinger, P. ; Gutsmiedl, E. ; Paul, S. ; Stoepler, R. ; Daum, M. ; Henneck, R. ; Kirch, K. ; Knecht, A. ; Lauss, B. ; Mtchedlishvili, A. ; Petzoldt, G. ; Zsigmond, G.

In: Nuclear Instruments and Methods in Physics Research Section A, 2009///doi: 10.1016/j.nima.2009.07.047

The existence of a mirror world holding a copy of our ordinary particle spectrum could lead to oscillations between the neutron (n) and its mirror partner (n′). Such oscillations could manifest themselves in storage experiments with ultracold neutrons whose storage lifetime would depend on the applied magnetic field. Here, extended details and measurements from the first dedicated experimental...

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