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News and Views
Nature 435, 437-438 (26 May 2005) | doi:10.1038/435437a; Published online 25 May 2005
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Particle physics: Electrons are not ambidextrous
Andrzej Czarnecki1 & William J. Marciano2
Abstract
The best low-energy measurement yet obtained of the electroweak mixing angle — a central parameter of the standard model of particle physics — is the last hurrah for Stanford's powerful two-mile linear accelerator.
Like speeding rifle-bullets, high-energy electrons can spin about the direction of their motion. Electrons spinning clockwise are said by convention to be left-handed; those spinning anticlockwise are right-handed.
- Andrzej Czarnecki is in the Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1, Canada.
Email: czar@phys.ualberta.ca - William J. Marciano is at the Brookhaven National Laboratory, Upton, New York 11973, USA. He is currently on leave at the Enrico Fermi Institute, University of Chicago.
Email: marciano@bnl.gov
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