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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

7 Citations (Scopus)


Measurement of a non-zero electric dipole moment (EDM) of the electron within a few orders of magnitude of the current best limit of vertical bar |d(e)| <1.05 x 10-27 e · cm 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 H 3Δ1 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 x 10-28 e·cm/√T, where T is the running time in days.

Original languageEnglish
Title of host publicationICAP 2012
Subtitle of host publication23rd international conference on atomic physics
EditorsOliver Dulieu, Philippe Grangier, Michele Leduc, Helene Perrin
Place of PublicationLes Ulis
PublisherEDP Sciences
Number of pages13
Publication statusPublished - 2013
Externally publishedYes
Event23rd International Conference on Atomic Physics (ICAP) - , France
Duration: 23 Jul 201227 Jul 2012

Publication series

NameEPJ Web of Conferences
ISSN (Print)2100-014X


Conference23rd International Conference on Atomic Physics (ICAP)

Bibliographical note

Copyright the Author(s) 2013. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Cite this