Cosmic Microwave Background Constraints on Very Dark Photons

Anthony Fradette, Maxim Pospelov, Josef Pradler, Adam Ritz

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


We analyze the effects of a massive dark photon with mV > 1 MeV on the Cosmic Microwave Background (CMB). We calculate the freeze-in abundance and derive limits on the parameter space from energy injections in the CMB. We find that for dark vectors in the mass range 1 MeV < mV 300 MeV, the model is already ruled out for effective electromagnetic coupling as low as 10-34 - 10-37.

Original languageEnglish (US)
Pages (from-to)689-693
Number of pages5
JournalPhysics Procedia
StatePublished - 2015
Externally publishedYes
Event13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013 - , United States
Duration: Sep 8 2013Sep 13 2013

Bibliographical note

Funding Information:
This work was supported in part by NSERC, Canada, and research at the Perimeter Institute is supported in part by the Government of Canada through NSERC and by the Province of Ontario through MEDT. The work of AF is partially supported by the Province of Québec through FRQNT.

Publisher Copyright:
© 2015 Published by Elsevier B.V.


  • Cosmic Microwave Background
  • Dark photons
  • Hidden sector


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