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Nature 441, 31-32 (4 May 2006) | doi:10.1038/441031a; Published online 3 May 2006
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Particle Physics: The first axion?
Steve Lamoreaux1
Abstract
For almost 30 years, the hunt has been on for a ghostly particle proposed to plug a gap in the standard model of particle physics. The detection of a tiny optical effect might be the first positive sighting.
Writing in Physical Review Letters1, Emilio Zavattini and colleagues of the Italian PVLAS collaboration report that a magnetic field can be used to rotate the polarization of a light wave in a vacuum. Although this is the first experimental evidence for such an effect, there is a well-rehearsed, but controversial, explanation for it: the existence of a never-before-seen, chargeless, spinless and near-massless particle — the axion.
- Steve Lamoreaux is at the Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Email: lamore@lanl.gov
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