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Order of magnitude smaller limit on the electric dipole moment of the electron

  • J. Baron
  • , W. C. Campbell
  • , D. DeMille
  • , J. M. Doyle
  • , G. Gabrielse
  • , Y. V. Gurevich
  • , P. W. Hess
  • , N. R. Hutzler
  • , E. Kirilov
  • , I. Kozyryev
  • , B. R. O'Leary
  • , C. D. Panda
  • , M. F. Parsons
  • , E. S. Petrik
  • , B. Spaun
  • , A. C. Vutha
  • , A. D. West

Research output: Contribution to journalArticlepeer-review

Abstract

The Standard Model of particle physics is known to be incomplete. Extensions to the Standard Model, such as weak-scale supersymmetry, posit the existence of new particles and interactions that are asymmetric under time reversal (T) and nearly always predict a small yet potentially measurable electron electric dipole moment (EDM), de, in the range of 10 -27 to 10-30 e·cm. The EDM is an asymmetric charge distribution along the electron spin (S) that is also asymmetric under T. Using the polar molecule thorium monoxide, we measured de = (-2.1 ± 3.7stat ± 2.5syst) x 10-29 e·cm. This corresponds to an upper limit of |d e| < 8.7 x 10-29 e·cm with 90%confidence, an order of magnitude improvement in sensitivity relative to the previous best limit. Our result constrains T-violating physics at the TeV energy scale.

Original languageEnglish (US)
Pages (from-to)269-272
Number of pages4
JournalScience
Volume343
Issue number6168
DOIs
StatePublished - 2014
Externally publishedYes

ASJC Scopus subject areas

  • General

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