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arXiv · 1307.1657

Advanced Cold Molecule Electron EDM

ACME Collaboration·Wesley C. Campbell·Cheong Chan·David DeMille·John M. Doyle·Gerald Gabrielse·Yulia V. Gurevich·Paul W. Hess·Nicholas R. Hutzler·Emil Kirilov·Brendon OLeary·Elizabeth S. Petrik·Ben Spaun·Amar C. Vutha
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Abstract

Measurement of a non-zero electric dipole moment (EDM) of the electron within a few orders of magnitude of the current best limit of |d_e| < 1.05 e -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 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 1 e -28 e cm/T^(1/2), where T is the running time in days.

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ACME Collaboration, Wesley C. Campbell, Cheong Chan, David DeMille, John M. Doyle, Gerald Gabrielse, Yulia V. Gurevich, Paul W. Hess, Nicholas R. Hutzler, Emil Kirilov, Brendon OLeary, Elizabeth S. Petrik, Ben Spaun, Amar C. Vutha. 2013-07-05. Advanced Cold Molecule Electron EDM. https://doi.org/10.1051/epjconf/20135702004

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