Shaping Dark Photon Spectral Distortions
arXiv:2409.12940 · doi:10.1007/JHEP03(2025)018
Abstract
The cosmic microwave background (CMB) spectrum is an extraordinary tool for exploring physics beyond the Standard Model. The exquisite precision of the measurement makes it particularly sensitive to small effects caused by hidden sector interactions. In particular, CMB spectral distortions can unveil the existence of dark photons which are kinetically coupled to the standard photon. In this work, we use the COBE-FIRAS dataset to derive accurate and robust limits on photon-to-dark-photon oscillations for a large range of dark photon masses, from to eV. We consider in detail the redshift dependence of the bounds, computing CMB distortions due to photon injection/removal using a Green's function method. Our treatment improves on previous results, which had set limits studying energy injection/removal into baryons rather than photon injection/removal, or ignored the redshift evolution of distortions. The difference between our treatment and previous ones is particularly noticeable in the predicted spectral shape of the distortions, a smoking gun signature for photon-to-dark-photon oscillations. The characterization of the spectral shape is crucial for future CMB missions, which could improve the present sensitivity by orders of magnitude, exploring regions of the dark photon parameter space that are otherwise difficult to access.
18 pages, 4 appendices, 7 figures; v2, minor improvements to the text, references added, results and conclusions unchanged
References in corpus (55)
- The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
- WISPy Cold Dark Matter
- The Primordial Inflation Explorer (PIXIE): A Nulling Polarimeter for Cosmic Microwave Background Observations
- Non-adiabatic Level Crossing in Resonant Neutrino Oscillations
- The evolution of CMB spectral distortions in the early Universe
- Bosonic super-WIMPs as keV-scale dark matter
- Stellar cooling bounds on new light particles: plasma mixing effects
- New stellar constraints on dark photons
- Dark photon limits: a handbook
- Direct Detection Constraints on Dark Photon Dark Matter
- HyRec: A fast and highly accurate primordial hydrogen and helium recombination code
- Constraining the mass of dark photons and axion-like particles through black-hole superradiance
- Solar constraints on hidden photons re-visited
- Ultra Light Boson Dark Matter and Event Horizon Telescope Observations of M87*
- Massive hidden photons as lukewarm dark matter
- Helioscope Bounds on Hidden Sector Photons
- Microwave Background Constraints on Mixing of Photons with Hidden Photons
- First results of the CERN Resonant WISP Search (CROWS)
- Teasing bits of information out of the CMB energy spectrum
- The Cosmological Evolution of Light Dark Photon Dark Matter
- The Price of Tiny Kinetic Mixing
- Dark Photon Oscillations in Our Inhomogeneous Universe
- Green's function of the cosmological thermalization problem
- New limits on dark photons from solar emission and keV scale dark matter
- Photon-axion conversion as a mechanism for supernova dimming: Limits from CMB spectral distortion
- Green's function of the cosmological thermalization problem II: effect of photon injection and constraints
- Continuous Global Symmetries and Hyperweak Interactions in String Compactifications
- Gas-rich dwarf galaxies as a new probe of dark matter interactions with ordinary matter
- Heating up the Galaxy with Hidden Photons
- Dark photon superradiance: Electrodynamics and multimessenger signals
- Atlas of solar hidden photon emission
- HYREC-2: a highly accurate sub-millisecond recombination code
- Direct detection of dark photon dark matter using radio telescopes
- Thermalization of large energy release in the early Universe
- Constraints on primordial magnetic fields from CMB distortions in the axiverse
- Dark Photon Dark Matter in the Presence of Inhomogeneous Structure
- Modeling Dark Photon Oscillations in Our Inhomogeneous Universe
- Effective photon mass and (dark) photon conversion in the inhomogeneous Universe
- Refined approximations for the distortion visibility function and mu-type spectral distortions
- Testing dark matter interactions with CMB spectral distortions
- Radio-frequency Dark Photon Dark Matter across the Sun
- Rich structure of non-thermal relativistic CMB spectral distortions from high energy particle cascades at redshifts
- Results from the Solar Hidden Photon Search (SHIPS)
- Polarized anisotropic spectral distortions of the CMB: Galactic and extragalactic constraints on photon-axion conversion
- Constraints on hidden photons from current and future observations of CMB spectral distortions
- Dark Photons in the Solar Basin
- CMB constraints on mass and coupling constant of light pseudoscalar particles
- Constraining dark photons and their connection to 21 cm cosmology with CMB data
- Millicharged Relics Reveal Massless Dark Photons
- Constraining hidden photons via atomic force microscope measurements and the Plimpton-Lawton experiment
- Cosmologically Varying Kinetic Mixing
- Patchy Screening of the CMB from Dark Photons
- Dark Solar Wind
- Constraints on photon mass and dark photon from the Jovian magnetic field
- Prospects on the Detection of Solar Dark Photons by the International Axion Observatory
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- Experimental targets for dark photon dark matter
- Scalar-Magnetometer Search for Ultralight Dark Photon Dark Matter with a Single-Site, Two-Sensor Array: A 6-Channel DTFT Likelihood Analysis with Scalar Optically Pumped Magnetometers
- The Dark Photon: a 2026 Perspective
- Improved Dark Photon Sensitivity from the Dark SRF Experiment
- Scattering meets absorption in dark matter detection