Publication: Advanced cold molecule electron EDM
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Date
2013
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EDP Sciences
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Campbell, Wesley C., Cheong Chan, David DeMille, John M. Doyle, Gerald Gabrielse, Yulia V. Gurevich, Paul W. Hess, et al. 2013. “Advanced Cold Molecule Electron EDM.” Edited by O. Dulieu, P. Grangier, M. Leduc, and H. Perrin. EPJ Web of Conferences 57: 02004. doi:10.1051/epjconf/20135702004.
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 |de| < 1.05×10−27 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 3Delta_1 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 d(de) = 1×10^−28 e · cm/√T ,where T is the running time in days.
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