Thermal dark-photon emission from Earth's core, recast onto SENSEI/DAMIC-M bounds, already constrains new ε parameter space; Oscura could improve by 2–3 orders of magnitude near 10^{-4} eV.
Microwave Background Constraints on Mixing of Photons with Hidden Photons
5 Pith papers cite this work. Polarity classification is still indexing.
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abstract
Various extensions of the Standard Model predict the existence of hidden photons kinetically mixing with the ordinary photon. This mixing leads to oscillations between photons and hidden photons, analogous to the observed oscillations between different neutrino flavors. In this context, we derive new bounds on the photon-hidden photon mixing parameters using the high precision cosmic microwave background spectral data collected by the Far Infrared Absolute Spectrophotometer instrument on board of the Cosmic Background Explorer. Requiring the distortions of the CMB induced by the photon-hidden photon mixing to be smaller than experimental upper limits, this leads to a bound on the mixing angle < 10^{-7}-10^{-5} for hidden photon masses between 10^{-14} eV and 10^{-7} eV. This low-mass and low-mixing region of the hidden photon parameter space was previously unconstrained.
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representative citing papers
Proposes that axion-photon conversion in pre-CMB helical magnetic fields imprints detectable V-mode polarization in the CMB, allowing CLASS 40 GHz observations to constrain ALP masses 10^{-10} to 10^{-8} eV and their photon coupling under optimistic nG field assumptions.
Resonant dilatonic coupling produces ultralight vector dark matter with relic mass scaling as m_γ' ∝ r_i^{-2} for subdominant spectators in radiation-dominated backgrounds.
The paper derives a density-matrix perturbation formula for two-state non-adiabatic transitions that reproduces the Landau-Zener result only to first order.
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-charged fermion constraints.
citing papers explorer
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Thermal Emission of Dark Photons from Earth's Core
Thermal dark-photon emission from Earth's core, recast onto SENSEI/DAMIC-M bounds, already constrains new ε parameter space; Oscura could improve by 2–3 orders of magnitude near 10^{-4} eV.
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Probing Axion-Photon conversion via circular polarization imprints in the CMB $V$-mode observations
Proposes that axion-photon conversion in pre-CMB helical magnetic fields imprints detectable V-mode polarization in the CMB, allowing CLASS 40 GHz observations to constrain ALP masses 10^{-10} to 10^{-8} eV and their photon coupling under optimistic nG field assumptions.
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Dilaton-Induced Resonant Production of Ultralight Vector Dark Matter
Resonant dilatonic coupling produces ultralight vector dark matter with relic mass scaling as m_γ' ∝ r_i^{-2} for subdominant spectators in radiation-dominated backgrounds.
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Non-adiabatic transitions in the density matrix formalism
The paper derives a density-matrix perturbation formula for two-state non-adiabatic transitions that reproduces the Landau-Zener result only to first order.
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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-charged fermion constraints.