Massó i Soler, Eduard, 1954-Toldrà Sabaté, Ramon2010-05-062010-05-0619970556-2821https://hdl.handle.net/2445/12354We obtain new stringent constraints on a light spinless particle f coupled only to photons at low energies, considering its effects on the extragalactic photon background, the black-body spectrum of the cosmic microwave background radiation and the cosmological abundance of deuterium.3 p.application/pdfeng(c) The American Physical Society, 1997Partícules (Física nuclear)AstronomiaAstrofísicaSistemes estelarsParticles (Nuclear physics)AstronomyAstrophysicsNew constraints on a light spinless particle coupled to photonsinfo:eu-repo/semantics/article508058info:eu-repo/semantics/openAccess