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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. et al
Dans Physics Procedia - 2nd International Workshop on the Physics of fundamental Symmetries and Interactions - PSI2010, Villigen : Suisse (2010) - http://hal.in2p3.fr/in2p3-00642009
Physique/Physique Nucléaire Expérimentale
The search for the neutron electric dipole moment at the Paul Scherrer Institute
C.A. Baker, G. Ban1, K. Bodek, M. Burghoff, Z. Chowdhuri2, M. Daum2, M. Fertl2, B. Franke2, P. Geltenbort3, K. Green, M.G.D. Van Der Grinten, E. Gutsmiedl, P.G. Harris, R. Henneck2, P. Iaydjiev, S.N. Ivanov, N. Khomutov3, M. Kasprzak, K. Kirch2, S. Kistryn, S. Knappe-Gr̈uneberg, A. Knecht2, P. Knowles, A. Kozela, B. Lauss2, T. Lefort1, Y. Lemière1, O. Naviliat-Cuncic1, J.M. Pendlebury3, E. Pierre1, 2, F.M. Piegsa, G. Pignol4, G. Quéméner1, S. Roccia, P. Schmidt-Wellenburg2, D. Shiers, K.F. Smith, A. Schnabel, L. Trahms, A. Weis, J. Zejma, J. Zenner2, G. Zsigmond2
1 :  LPCC - Laboratoire de Physique Corpusculaire de Caen
http://www.lpc-caen.in2p3.fr/
CNRS : UMR6534 – IN2P3 – Université de Caen Basse-Normandie – Ecole Nationale Supérieure d'Ingénieurs de Caen
ENSICAEN - 6, boulevard du Marechal Juin 14050 Caen Cedex
France
2 :  PSI - Paul Scherrer Institut
http://www.psi.ch/index_e.shtml
Aucune
Paul Scherrer Institut, Villigen PSI, CH5232 Villigen, Suisse
Suisse
3 :  ILL - Institut Laue-Langevin
http://www.ill.fr/
ILL
6, rue Jules Horowitz BP 156 38042 Grenoble Cedex 9
France
4 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
http://lpsc.in2p3.fr
CNRS : UMR5821 – IN2P3 – Université Joseph Fourier - Grenoble I – Institut Polytechnique de Grenoble - Grenoble Institute of Technology
53 avenue des Martyrs - 38026 Grenoble Cedex
France
Intéractions fondamentales
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 the experimental sensitivity by a factor of 5 within 2-3 years, using an upgrade of the same apparatus. We will take advantage of the increased ultracold neutron density at the Paul Scherrer Institute (PSI) and of a new concept including both, external magnetometers and a cohabiting magnetometer. In parallel, a next generation apparatus with two UCN storage chambers and an elaborate magnetic field control is being designed aiming to achieve another order of magnitude increase in sensitivity, allowing us to put a limit as tight as dn < 5 × 10-28 e cm (95% C.L.), if not establishing a finite value.

Communications avec actes
2011
2010
Physics Procedia
internationale
17
159-167

2nd International Workshop on the Physics of fundamental Symmetries and Interactions - PSI2010
Villigen
Suisse
11/10/2010
14/10/2010
S. Roccia

LPSC10247
Neutron electric dipole moment – Magnetometry – Ultracold neutrons