CMB isocurvature distinguishes Higgsed dark-photon DM production histories via a model-independent response formalism, requiring q_eff >=2 and initial displacements >3.5e4 H_* for perturbative full-abundance cases.
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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.
This work sets new upper limits on decay lifetimes and couplings for axion-like particles, dark photons, scalars, and B-L or L_i-L_j vector bosons using 511 keV line, X-ray continuum, and cosmic-ray flux observations.
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CMB Test of the Higgs Origin of Dark-Photon Dark Matter
CMB isocurvature distinguishes Higgsed dark-photon DM production histories via a model-independent response formalism, requiring q_eff >=2 and initial displacements >3.5e4 H_* for perturbative full-abundance cases.
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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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INTEGRAL, eROSITA and Voyager Constraints on Light Bosonic Dark Matter: ALPs, Dark Photons, Scalars, $B-L$ and $L_{i}-L_{j}$ Vectors
This work sets new upper limits on decay lifetimes and couplings for axion-like particles, dark photons, scalars, and B-L or L_i-L_j vector bosons using 511 keV line, X-ray continuum, and cosmic-ray flux observations.