Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dmap.conf..536y&link_type=abstract
DARK MATTER IN ASTROPARTICLE AND PARTICLE PHYSICS. Proceedings of the 6th International Heidelberg Conference. Held 24-28 Septem
Physics
Axion, Photon, Dark Matter
Scientific paper
We report the first results of the GammeV experiment, a search for meV mass particles converted from photons. The experiment uses a strong external magnetic field to induce oscillations between incident photons from a pulsed laser and axion-like particles. A mirror is placed at a position within the magnetic field such that photons can not pass through the second part of the magnetic field. On the other hand, the weakly interacting axion-like particles can pass through beyond the mirror and may convert back into the photons. The regenerated photons then detected with a photomultiplier tube. The oscillation baseline of the apparatus is designed to vary, allowing probes of different values of particle mass. We find no excess of events above background. The two-photon couplings of possible new scalar (pseudoscalar) particles to be less than 3.2 × 10-7 GeV-1 (3.2 × 10-7 GeV-1) in the limit of massless particles.
Gammev Collaboration
Yoo Jae
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