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Methods, Analysis, and the Treatment of Systematic Errors for the Electron Electric Dipole Moment Search in Thorium Monoxide
ACME Collaboration, Jacob Baron, Wes C. Campbell +15
We recently set a new limit on the electric dipole moment of the electron (eEDM) (J. Baron et al., ACME collaboration, Science 343 (2014), 269-272), which represented an order-of-m…
Direct Frequency Comb Measurement of OD + CO -> DOCO Kinetics
Bryce J. Bjork, Thinh Q. Bui, Oliver H. Heckl +9
The kinetics of the OH + CO reaction, fundamental to both atmospheric and combustion chemistry, are complex due to the formation of the HOCO intermediate. Despite extensive studies…
Zeeman interaction in ThO for the electron EDM search
A. N. Petrov, L. V. Skripnikov, A. V. Titov +7
The current limit on the electron's electric dipole moment, (90% confidence), was set using the molecule thorium monoxide (T…
Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron
ACME Collaboration, Jacob Baron, Wesley C. Campbell +15
The Standard Model (SM) of particle physics fails to explain dark matter and why matter survived annihilation with antimatter following the Big Bang. Extensions to the SM, such as…
Advanced Cold Molecule Electron EDM
ACME Collaboration, Wesley C. Campbell, Cheong Chan +11
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…
Shot-noise-limited spin measurements in a pulsed molecular beam
E. Kirilov, W. C. Campbell, J. M. Doyle +9
Heavy diatomic molecules have been identified as good candidates for use in electron electric dipole moment (eEDM) searches. Suitable molecular species can be produced in pulsed be…
Magnetic and electric dipole moments of the state in ThO
Amar C. Vutha, Benjamin Spaun, Yulia V. Gurevich +5
The metastable state in the thorium monoxide (ThO) molecule is highly sensitive to the presence of a CP-violating permanent electric dipole moment of the electron (eE…
A cryogenic beam of refractory, chemically reactive molecules with expansion cooling
Nicholas R. Hutzler, Maxwell Parsons, Yulia V. Gurevich +7
Cryogenically cooled buffer gas beam sources of the molecule thorium monoxide (ThO) are optimized and characterized. Both helium and neon buffer gas sources are shown to produce Th…
Search for the electric dipole moment of the electron with thorium monoxide
Amar C. Vutha, Wesley C. Campbell, Yulia V. Gurevich +8
The electric dipole moment of the electron (eEDM) is a signature of CP-violating physics beyond the Standard Model. We describe an ongoing experiment to measure or set improved lim…