New stellar constraints on dark photons

Haipeng An, Maxim Pospelov, Josef Pradler

Research output: Contribution to journalArticlepeer-review

117 Scopus citations


We consider the stellar production of vector states V within the minimal model of "dark photons". We show that when the Stückelberg mass of the dark vector becomes smaller than plasma frequency, the emission rate is dominated by the production of the longitudinal modes of V, and scales as κ2mV2, where κ and mV are the mixing angle with the photon and the mass of the dark state. This is in contrast with widespread assertions in the literature that the emission rate decouples as the forth power of the mass. We derive ensuing constraints on the (κ, mV) parameter space by calculating the cooling rates for the Sun and horizontal branch stars. We find that stellar bounds for mV<10eV are significantly strengthened, to the extent that all current "light-shining-through-wall" experiments find themselves within deeply excluded regions.

Original languageEnglish (US)
Pages (from-to)190-195
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number4-5
StatePublished - Oct 1 2013
Externally publishedYes

Bibliographical note

Funding Information:
Research at the Perimeter Institute is supported in part by the Government of Canada through NSERC and by the Province of Ontario through MEDT .

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