nEDM experiment at PSI: data-taking strategy and sensitivity of the dataset

C. Abel , N.J. Ayres , G. Ban (1) , G. Bison , K. Bodek , V. Bondar , E. Chanel , P.J. Chiu , M. Daum , S. Emmenegger , L. Ferraris-Bouchez (2) , P. Flaux (1) , W.C. Griffith , P.G. Harris , N. Hild , Y. Kermaidic (2) , K. Kirch , P.A. Koss , J. Krempel , B. Lauss , T. Lefort (1) , Y. Lemiere (1) , A. Leredde (2) , P. Mohanmurthy , M. Musgrave , O. Naviliat-Cuncic (1) , D. Pais , F.M. Piegsa , G. Pignol (2) , M. Rawlik , D. Rebreyend (2) , D. Ries , S. Roccia (3) , D. Rozpedzik , P. Schmidt-Wellenburg , A. Schnabel , N. Severijns , J. Thorne , R. Virot (2) , J. Voigt , A. Weis , E. Wursten , J. Zejma , G. Zsigmond

1 LPCC - Laboratoire de physique corpusculaire de Caen
2 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
3 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière

We report on the strategy used to optimize the sensitivity of our search for a neutron electric dipole moment at the Paul Scherrer Institute. Measurements were made upon ultracold neutrons stored within a single chamber at the heart of our apparatus. A mercury cohabiting magnetometer together with an array of cesium magnetometers were used to monitor the magnetic field, which was controlled and shaped by a series of precision field coils. In addition to details of the setup itself, we describe the chosen path to realize an appropriate balance between achieving the highest statistical sensitivity alongside the necessary control on systematic effects. The resulting irreducible sensitivity is better than 1 × 10−26e cm. This contribution summarizes in a single coherent picture the results of the most recent publications of the collaboration.

Domaines: Instrumentations et Détecteurs [physics.ins-det]; Physique Nucléaire Expérimentale [nucl-ex]

C. Abel, N.J. Ayres, G. Ban, G. Bison, K. Bodek, et al.. nEDM experiment at PSI: data-taking strategy and sensitivity of the dataset. International Workshop on Particle Physics at Neutron Sources 2018, May 2018, Grenoble, France. pp.02001, ⟨10.1051/epjconf/201921902001⟩. ⟨hal-01922057⟩