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

被引：806

作者：

Baron, J. ^{[1
]}

Campbell, W. C. ^{[2
]}

DeMille, D. ^{[3
]}

Doyle, J. M. ^{[1
]}

Gabrielse, G. ^{[1
]}

Gurevich, Y. V. ^{[1
]}

Hess, P. W. ^{[1
]}

Hutzler, N. R. ^{[1
]}

Kirilov, E. ^{[3
]}

Kozyryev, I. ^{[3
]}

O'Leary, B. R. ^{[3
]}

Panda, C. D. ^{[1
]}

Parsons, M. F. ^{[1
]}

Petrik, E. S. ^{[1
]}

Spaun, B. ^{[1
]}

Vutha, A. C. ^{[4
]}

West, A. D. ^{[3
]}

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[3] Yale Univ, Dept Phys, New Haven, CT 06511 USA

[4] York Univ, Dept Phys & Astron, Toronto, ON M3J 1P3, Canada

来源：

SCIENCE | 2014年 / 343卷 / 6168期

基金：

美国国家科学基金会;

关键词：

SEARCH; ATOMS;

D O I：

10.1126/science.1248213

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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) over right arrow) that is also asymmetric under T. Using the polar molecule thorium monoxide, we measured d(e) = (-2.1 +/- 3.7(stat) +/- 2.5(syst)) x 10(-29) e.cm. This corresponds to an upper limit of vertical bar d(e)vertical bar < 8.7 x 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.

引用

页码：269 / 272

页数：4

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