Using The Earth As A Polarized Electron Source To Search For Long Range Spin-Spin Interactions
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Description |
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Many extensions of the standard model of particle physics predict the existence of long-range spin-spin interactions. We have developed an approach which uses the Earth as a polarized spin source to investigate these interactions. We combine recent deep-Earth geophysics and geochemistry results with precise tabulations of the geomagnetic field to create a comprehensive map of electron polarization within the Earth. We examine possible long-range interactions between these spin-polarized geoelectrons and the spin-polarized electrons and nucleons in three laboratory experiments. By combining our model and the results from these experiments we establish new stringent bounds on torsion gravity and possible long-range spin-spin forces associated with the virtual exchange of either spin-one axial bosons or unparticles. The resulting bound on the spin-spin force between an electron and a neutron is one million times smaller than their gravitational attraction. |
Details |
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Title |
Using The Earth As A Polarized Electron Source To Search For Long Range Spin-Spin Interactions |
Creator |
University of California, Berkeley. Dept. of Physics |
Published |
Berkeley, CA, University of California, Berkeley, Dept. of Physics, September 23, 2013 |
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 September 23, 2013, sponsored by the Dept. of Physics, University of California, Berkeley. originally produced as an .mts file in 2013 Speakers: Larry Hunter. |
Usage Statement |
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Collection |
Physics Colloquia |
Tracks |
colloquia/9-23-13Hunter.mp4 00:56:07 |
Linked Resources |
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