2014/10/31 by D. Kazanas, Demos Kazanas, Rabindra N. Mohapatra +4 · 3 citations
Physics and Astronomy · #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark photon #Kinetic energy #Mixing (physics) #Nuclear physics #Particle physics #Photon #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Range (aeronautics) #Supernova #Yield (engineering) #astro-ph.CO #astro-ph.HE #astro-ph.SR #hep-ph
paper · pdf · doi:10.1016/j.nuclphysb.2014.11.009
published as Nuclear Physics B 890 (2015) 17 · 10 pages, 6 figures, minor typos corrected, version to appear in NPB
arxiv created 2014/11/07 · openalex publication_date 2014/11/16 · arxiv updated 2014/11/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The hypothetical massive dark photon (γ′) which has kinetic mixing with the SM photon can decay electromagnetically to e+e− pairs if its mass m exceeds 2me, and otherwise into three SM photons. These decays yield cosmological and supernovae associated signatures. We briefly discuss these signatures, particularly in connection with the supernova SN1987A, and delineate the extra constraints that arise on the mass and mixing parameter of the dark photon. In particular, we find that for dark photon mass mγ′ in the 5–20 MeV range arguments based on supernova 1987A observations lead to a bound on ϵ which is about 300 times stronger than the presently existing bounds based on energy loss arguments.