Advanced Cold Molecule Electron EDM

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.

International Conference for Atomic Physics (ICAP) 2012 proceedings paper. Accepted for publication in the European Physical Journal (EPJ). 13 pages, 5 figures, 3 tables

References in corpus (5)

• The Buffer Gas Beam: An Intense, Cold, and Slow Source for Atoms and Molecules
• Measurement of the electron's electric dipole moment using YbF molecules: methods and data analysis
• Candidate molecular ions for an electron electric dipole moment experiment
• Prospects for an electron electric dipole moment search in metastable ThO and ThF${}^{+}$
• Shot-noise-limited spin measurements in a pulsed molecular beam

Cited by in corpus (5)

• Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron
• Zeeman interaction in ThO $H^3{\Delta }_1$ for the electron EDM search
• Getting a Grip on the Transverse Motion in a Zeeman Decelerator
• Deceleration and trapping of ammonia molecules in a traveling wave decelerator
• Wigner distributions for an electron