Improved Experimental Limit on the Electric Dipole Moment of the Neutron

C. A. Baker, D. D. Doyle, P. Geltenbort, K. Green, M. G. D. van der Grinten, P. G. Harris, P. Iaydjiev, S. N. Ivanov, D. J. R. May, J. M. Pendlebury, J. D. Richardson, D. Shiers, and K. F. Smith
Phys. Rev. Lett. 97, 131801 – Published 27 September 2006

Abstract

An experimental search for an electric dipole moment (EDM) of the neutron has been carried out at the Institut Laue-Langevin, Grenoble. Spurious signals from magnetic-field fluctuations were reduced to insignificance by the use of a cohabiting atomic-mercury magnetometer. Systematic uncertainties, including geometric-phase-induced false EDMs, have been carefully studied. The results may be interpreted as an upper limit on the neutron EDM of |dn|<2.9×1026ecm (90% C.L.).

  • Figure
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  • Received 9 February 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.131801

©2006 American Physical Society

Authors & Affiliations

C. A. Baker1, D. D. Doyle2, P. Geltenbort3, K. Green1,2, M. G. D. van der Grinten1,2, P. G. Harris2, P. Iaydjiev1,*, S. N. Ivanov1,†, D. J. R. May2, J. M. Pendlebury2, J. D. Richardson2, D. Shiers2, and K. F. Smith2

  • 1Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom
  • 2Department of Physics and Astronomy, University of Sussex, Falmer, Brighton BN1 9QH, United Kingdom
  • 3Institut Laue-Langevin, BP 156, F-38042 Grenoble Cedex 9, France

  • *On leave from Institute of Nuclear Research and Nuclear Energy, Sofia, Bulgaria.
  • On leave from PNPI, Russia.

Comments & Replies

Baker et al. Reply:

C. A. Baker, D. D. Doyle, P. Geltenbort, K. Green, M. G. D. van der Grinten, P. G. Harris, P. Iaydjiev, S. N. Ivanov, D. J. R. May, J. M. Pendlebury, J. D. Richardson, D. Shiers, and K. F. Smith
Phys. Rev. Lett. 98, 149102 (2007)

Comment on “Improved Experimental Limit on the Electric Dipole Moment of the Neutron”

S. K. Lamoreaux and R. Golub
Phys. Rev. Lett. 98, 149101 (2007)

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Vol. 97, Iss. 13 — 29 September 2006

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