New constraints on a light spinless particle coupled to photons

Eduard Massó and Ramon Toldrà
Phys. Rev. D 55, 7967 – Published 15 June 1997

Abstract

We obtain new stringent constraints on a light spinless particle φ 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.

  • Received 6 February 1997

DOI:https://doi.org/10.1103/PhysRevD.55.7967

©1997 American Physical Society

Authors & Affiliations

Eduard Massó and Ramon Toldrà

  • Grup de Física Teòrica and IFAE, Universitat Autònoma de Barcelona, Edifici Cn, E-08193 Bellaterra, Spain

Issue

Vol. 55, Iss. 12 — 15 June 1997

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