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The GammeV experiment (shown below) is a gamma to milli-eV particle search using a "light shining through a wall" technique. A second component of the experiment is to search for Chameleon particles. Results from the axion particle search have been published in Physical Review Letters. Chameleon results appeared in Physical Review Letters as well. There is also a Science Article about the experiment. More recent chameleon results can be found here.




GammeV constraints on the coupling of scalar and pseudoscalar axion-like particles to photons as a function of the particle mass. The blue curves are for data taken in the center position of the plunger, the red curves are for data taken in the edge position, and the black curves is from a joint analysis of all data.

GammeV experiment homepage

Seminar talk presented at the Laboratory for Particle Physics and Cosmology at Harvard University. February 2008.
Talk given at the 3rd Joint ILIAS-CERN-DESY Axion-WIMPs workshop in Patras, Greece. June 2007.

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