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Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron

Baron, J. and Campbell, W. C. and DeMille, D. and Doyle, J. M. and Gabrielse, G. and Gurevich, Y. V. and Hess, P. W. and Hutzler, N. R. and Kirilov, E. and Kozyryev, I. and O'Leary, B. R. and Panda, C. D. and Parsons, M. F. and Petrik, E. S. and Spaun, B. and Vutha, A. C. and West, A. D. (2014) Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron. Science, 343 (6168). pp. 269-272. ISSN 0036-8075. doi:10.1126/science.1248213.

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The Standard Model of particle physics is known to be incomplete. Extensions to the Standard Model, such as weak-scale supersymmetry, posit the existence of new particles and interactions that are asymmetric under time reversal (T) and nearly always predict a small yet potentially measurable electron electric dipole moment (EDM), d_e, in the range of 10^(−27) to 10^(−30) e·cm. The EDM is an asymmetric charge distribution along the electron spin (S) that is also asymmetric under T. Using the polar molecule thorium monoxide, we measured d_e = (–2.1±3.7_(stat)±2.5_(syst)) × 10−29 e·cm. This corresponds to an upper limit of ❘d_e❘ < 8.7 × 10^(−29) e·cm with 90% confidence, an order of magnitude improvement in sensitivity relative to the previous best limit. Our result constrains T-violating physics at the TeV energy scale.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Baron, J.0000-0002-4027-3965
Hess, P. W.0000-0003-2985-4221
Hutzler, N. R.0000-0002-5203-3635
West, A. D.0000-0003-4098-0165
Additional Information:© 2014 American Association for the Advancement of Science. 7 November 2013; accepted 9 December 2013 Published online 19 December 2013. Supported by NSF and the Precision Measurement Grants Program of the National Institute of Standards and Technology. We thank M. Reece and M. Schwartz for discussions and S. Cotreau, J. MacArthur, and S. Sansone for technical support. P.W.H. was supported in part by the Office of Science Graduate Fellowship Program, U.S. Department of Energy. The authors declare no competing financial interests.
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National Institute of Standards and Technology (NIST)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Issue or Number:6168
Record Number:CaltechAUTHORS:20170831-103920092
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Official Citation:Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron BY THE ACME COLLABORATION, J. BARON, W. C. CAMPBELL, D. DEMILLE, J. M. DOYLE, G. GABRIELSE, Y. V. GUREVICH, P. W. HESS, N. R. HUTZLER, E. KIRILOV, I. KOZYRYEV, B. R. O’LEARY, C. D. PANDA, M. F. PARSONS, E. S. PETRIK, B. SPAUN, A. C. VUTHA, A. D. WEST PUBLISHED ONLINE19 DEC 2013 DOI: 10.1126/science.1248213
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:81013
Deposited By: Ruth Sustaita
Deposited On:05 Sep 2017 18:09
Last Modified:15 Nov 2021 19:40

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