It's a good time to be a particle physicist. The long-sought Higgs boson particle seems finally to have been found at an accelerator in Geneva, and scientists are now hot on the trail of another tiny piece of the universe, this one tied to a new fundamental force of nature.
An experiment using the Earth itself as a source of electrons has narrowed down the search for a new force-bearing particle, placing tighter limits on how big the force it carries can be.
As an added bonus, if the new particle is real, it will shed light on processes and structures inside Earth, say study researchers from Amherst College and the University of Texas at Austin. The experimental results appear in the Feb. 22 issue of the journal Science.
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