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Cosmological Constraints on Very Dark Photons
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abstract
We explore the cosmological consequences of kinetically mixed dark photons with a mass between 1 MeV and 10 GeV, and an effective electromagnetic fine structure constant as small as $10^{-38}$. We calculate the freeze-in abundance of these dark photons in the early Universe and explore the impact of late decays on BBN and the CMB. This leads to new constraints on the parameter space of mass $m_V$ vs kinetic mixing parameter $\kappa$.
Forward citations
Cited by 12 Pith papers
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The Price of Tiny Kinetic Mixing
The paper derives a six-loop gravitational floor for hidden-photon kinetic mixing near 10^-13 and surveys other loop and GUT mechanisms that can produce tiny mixing.
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Dark matter from dark photons: a taxonomy of dark matter production
A taxonomy of dark matter production via massive dark photons yields nine regimes, four new, including the new mechanism sequential freeze-in.
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Theoretical uncertainties in reconstructing model parameters with gravitational waves from supercooled phase transitions
In the conformal U(1)_X model, the daisy-resummed nucleation scheme shifts LISA-reconstructed gauge couplings by O(10%) relative to the NLO effective-field-theory result, an order of magnitude above the Fisher-matrix ...
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Dark Photons in the Early Universe: From Thermal Production to Cosmological Constraints
Dark photon thermal production is computed analytically, yielding a fixed 4πe/27 ≈ 0.14 resonance-to-inverse-decay ratio and new cosmological limits down to ε~10^-12 over 0.1–6 MeV.
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Vector dark matter with non-abelian kinetic mixing
A four-boson dark sector with one non-abelian kinetic-mixing operator can produce the observed dark-matter abundance by freeze-out, freeze-in, or 3-to-2 annihilations, with a dark-photon mediator almost degenerate wit...
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Out of the darkness: probing the inflationary era with dark photon dark matter
A confirmed dark photon dark matter detection at 19.5 micro-electronvolts would, via the inflationary production formula, predict tensor modes just below current limits and within reach of next-generation experiments,...
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In-flight positron annihilation as a probe of feebly interacting particles
In-flight annihilation of positrons produced by supernova feebly interacting particles gives the strongest astrophysical bounds on their electron couplings for masses of roughly 10-200 MeV, covering ALPs, sterile neut...
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Strong Constraints on Dark Photon and Scalar Dark Matter Decay from INTEGRAL and AMS-02 data
Using INTEGRAL x-ray and AMS-02 positron data, the authors set lower limits on dark photon and scalar dark matter decay lifetimes from 10^25 to 10^29 seconds across 1 MeV to 2 TeV masses.
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A critical look at low-scale cosmological phase transitions in the PTA era
Precision study of dark sector phase transitions finds PTA-favored parameters near EFT breakdown with disfavored GW signals after higher-order corrections.
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Dark Photons from Red Dwarfs
Red dwarf mass-radius data from eclipsing binaries combined with dark-photon-inclusive evolution simulations produce competitive constraints on light dark photons.
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Exploring the lifetime frontier with a beam-dump experiment at CiADS
A proposed CiADS beam-dump experiment could search for dark photons and reach currently unexcluded parameter space around 100 MeV mass and 1e-9 to 1e-8 kinetic mixing.
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The Dark Photon
The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-...
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