Advanced cold molecule electron EDM

Wesley C. Campbell, Cheong Chan, David Demille, John M. Doyle, Gerald Gabrielse, Yulia V. Gurevich, Paul W. Hess, Nicholas R. Hutzler, Emil Kirilov, Brendon O'Leary, Elizabeth S. Petrik, Ben Spaun, Amar C. Vutha

Research output: Contribution to journalConference articlepeer-review

9 Scopus citations


Measurement of a non-zero electric dipole moment (EDM) of the electron within a few orders of magnitude of the current best limit of |de| < 1.05 × 10-27 e×cm [1] would be an indication of physics beyond the Standard Model. The ACME Collaboration is searching for an electron EDM by performing a precision measurement of electron spin precession in the metastable H3Δ1 state of thorium monoxide (ThO) using a slow, cryogenic beam. We discuss the current status of the experiment. Based on a data set acquired from 14 hours of running time over a period of 2 days, we have achieved a 1-sigma statistical uncertainty of δde = 1 × 10-28 e×cm/√T, where T is the running time in days.

Original languageEnglish (US)
Article number02004
JournalEPJ Web of Conferences
StatePublished - 2013
Event23rd International Conference on Atomic Physics, ICAP 2012 - Palaiseau, France
Duration: Jul 23 2012Jul 27 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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