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High Energy Physics - Experiment
Title: Search for axion-like particles using a variable baseline photon regeneration technique
(Submitted on 22 Oct 2007 (v1), last revised 16 Jan 2008 (this version, v2))
Abstract: 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.
Submission history
From: Aaron S. Chou [view email][v1] Mon, 22 Oct 2007 19:20:15 GMT (20kb)
[v2] Wed, 16 Jan 2008 20:48:30 GMT (39kb)