Laboratory experiment demonstrates new mass and coupling limits for axion-like particles, excluding previous anomalous findings with 95% confidence.
A new method to amplify the photon-axion conversions in a magnetic field is proposed using a buffer gas at a specific pressure in a photon-regeneration experiment. As a first result, new bounds for mass and coupling constant for laboratory experiments aiming to detect any hypothetical scalars and pseudoscalars, which can couple to photons were obtained, excluding with 95% confidence level, the recently withdrawn PVLAS result.
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Pugnat et al. (2008) studied this question.
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