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High Energy Physics - Experiment

Title: Measurement of the electron electric dipole moment using YbF molecules

Abstract: The most sensitive measurements of the electron electric dipole moment d_e have previously been made using heavy atoms. Heavy polar molecules offer a greater sensitivity to d_e because the interaction energy to be measured is typically 10^3 times larger than in a heavy atom. We report the first measurement of this kind, for which we have used the molecule YbF. Together, the large interaction energy and the strong tensor polarizability of the molecule make our experiment essentially free of the systematic errors that currently limit d_e measurements in atoms. Our first result d_e = (- 0.2 \pm 3.2) x 10^-26 e.cm is less sensitive than the best atom measurement, but is limited only by counting statistics and demonstrates the power of the method.
Comments: 4 pages, 4 figures. v2. Minor corrections and clarifications made in response to referee comments
Subjects: High Energy Physics - Experiment (hep-ex)
Journal reference: Phys.Rev.Lett.89:023003,2002
DOI: 10.1103/PhysRevLett.89.023003
Cite as: arXiv:hep-ex/0202014
  (or arXiv:hep-ex/0202014v2 for this version)

Submission history

From: Edward Hinds [view email]
[v1] Wed, 6 Feb 2002 10:35:23 GMT (524kb)
[v2] Thu, 30 May 2002 10:50:10 GMT (375kb)