2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/211044A 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.4 pages, 5 figuresHigh Energy Physics - Experimenttext