First results from the OSQAR photon regeneration experiment: No light shining through a wall

Understand

A new method to amplify the photon-axion conversions in magnetic field is proposed using a buffer gas at a specific pressure.

• As a first result, new bounds for mass and coupling constant for purely laboratory experiments aiming to detect any hypothetical scalars and pseudo-scalars which can couple to photons were obtained at 95% confidence level, excluding the PVLAS result newly disclaimed.