Search for axion-like particles using a variable baseline photon regeneration technique

Details Search for axion-like particles using a variable baseline photon regeneration technique Search for axion-like particles using a variable baseline photon regeneration technique

2007-10-22

arxiv.org/abs/0710.3783v2

Phys.Rev.Lett.100:080402, 2008

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 4 figures. This is the version accepted by PRL and includes updated limits

Scientific paper

10.1103/PhysRevLett.100.080402

We report the first results of the GammeV experiment, a search for milli-eV mass particles with axion-like couplings to two photons. The search is performed using a "light shining through a wall" technique where incident photons oscillate into new weakly interacting particles that are able to pass through the wall and subsequently regenerate back into detectable photons. The oscillation baseline of the apparatus is variable, thus allowing probes of different values of particle mass. We find no excess of events above background and are able to constrain the two-photon couplings of possible new scalar (pseudoscalar) particles to be less than 3.1x10^{-7} GeV^{-1} (3.5x10^{-7} GeV^{-1}) in the limit of massless particles.

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