2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/181717The PVLAS collaboration has results that may be interpreted in terms of a light axion-like particle, while the CAST collaboration has not found any signal of such particles. We propose a particle physics model with paraphotons and with a low energy scale in which this apparent inconsistency is circumvented.10 pages, 3 figures, version accepted for publication in Physical Review LettersHigh Energy Physics - PhenomenologyAstrophysicstext