Audio / Video

A Tabletop-scale Probe for TeV Physics

  • 01:07:52


Time-reversal (T) symmetry is observed to be broken in K-and B-meson decays, in a manner consistent with the Standard Model (SM) of electroweak interactions. Violation of T-invariance can also cause elementary particles such as the electron to have an electric dipole moment (EDM) along their spin. Although the SM prediction for the electron EDM is too small to detect, extensions to the SM frequently predict EDMs within a few orders of magnitude of the current limit. I will describe the ACME experiment, which uses methods of atomic and molecular physics to detect the electron’s EDM. We recently completed the most sensitive search for this quantity. Our result is consistent with zero, but sets a limit an order of magnitude smaller than previous work. Remarkably, the result of this tabletop-scale experiment sets strong constraints on the existence of new physics at energies at or above the TeV scale being probed at the Large Hadron Collider, and has a substantial impact on theories of physics beyond the Standard Model.



A Tabletop-scale Probe for TeV Physics


University of California, Berkeley. Dept. of Physics


Berkeley, CA, University of California, Berkeley, Dept. of Physics, November 17, 2014

Full Collection Name

Physics Colloquia






1 streaming video file

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digital, sd., col.


Physics Library


Recorded at a colloquium held on November 17, 2014, sponsored by the Dept. of Physics, University of California, Berkeley.

originally produced as an .mts file in 2014

Speakers: DeMille, David.

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Physics Colloquia


colloquia/11-17-14DeMille.mp4 01:07:52

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