Audio / Video

Ultrasensitive searches for the axion

  • 01:03:07

Description

After four decades, the axion, a hypothetical elementary particle, still represents the best solution to the Strong-CP problem, i.e. why the neutron has a vanishingly small electric dipole moment. Should the axion exist, it would be extremely light, and possess extraordinarily feeble couplings to matter and radiation, far beyond the reach of conventional particle physics experiments. Very light axions would also have been produced abundantly during the Big Bang, and thus the axion represents a well-motivated dark matter candidate. However, the coherent mixing of axions and photons in a strong magnetic field provides a strategy for elegant and ultrasensitive experiments that may finally render the axion observable. This talk will primarily review the microwave cavity search for halo dark matter axions and present first results from a high-frequency search, but also briefly discuss the search for solar axions, and purely laboratory experiments, such as photon regeneration (“shining light through the wall”).

Details

Title

Ultrasensitive searches for the axion

Creator

University of California, Berkeley. Dept. of Physics

Published

Berkeley, CA, University of California, Berkeley, Dept. of Physics, November 28, 2016

Full Collection Name

Physics Colloquia

Type

Video

Format

Lecture.

Extent

1 streaming video file

Other Physical Details

digital, sd., col.

Archive

Physics Library

Note

Recorded at a colloquium held on November 28, 2016, sponsored by the Dept. of Physics, University of California, Berkeley.

originally produced as an .mts file in 2016

Speakers: van Bibber, Karl.

Collection

Physics Colloquia

Tracks

colloquia/11-28-16vanBibber.mp4 01:03:07

Linked Resources

View record in Digital Collections.