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.
Bosonic super-WIMPs as keV-scale dark matter
7 Pith papers cite this work. Polarity classification is still indexing.
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abstract
We consider models of light super-weakly interacting cold dark matter, with O(10-100) keV mass, focusing on bosonic candidates such as pseudoscalars and vectors. We analyze the cosmological abundance, the gamma-background created by particle decays, the impact on stellar processes due to cooling, and the direct detection capabilities in order to identify classes of models that pass all the constraints. In certain models, variants of photoelectric (or axioelectric) absorption of dark matter in direct-detection experiments can provide a sensitivity to the superweak couplings to the Standard Model which is superior to all existing indirect constraints. In all models studied, the annual modulation of the direct-detection signal is at the currently unobservable level of O(10^{-5}).
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Solar tachocline production of symmetrons yields a keV-scale flux at Earth whose absorption in xenon detectors provides new complementary bounds on symmetron parameter space.
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.
Supernova models yield coupling limits g_a ≲ 0.9×10^{-10} and g_φ ≲ 0.4×10^{-10} for masses above 100 keV from gamma-ray observations, plus stronger trapping-regime limits from explosion energy, that are difficult to reconcile with a muon g-2 explanation.
In a dark-photon-mediated Dirac fermionic DM model, only narrow resonant regions with small dark-sector coupling allow the candidate to saturate the full relic density while evading current direct and indirect detection bounds.
NuSTAR stray-light data yields the strongest indirect bounds on decaying electrophilic scalar, ALP, and dark photon DM in the 6-70 keV range, plus inelastic DM with mass splittings 3-100 keV.
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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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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Probing Solar Symmetrons with Direct Detection
Solar tachocline production of symmetrons yields a keV-scale flux at Earth whose absorption in xenon detectors provides new complementary bounds on symmetron parameter space.
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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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Muonic Boson Limits: Supernova Redux
Supernova models yield coupling limits g_a ≲ 0.9×10^{-10} and g_φ ≲ 0.4×10^{-10} for masses above 100 keV from gamma-ray observations, plus stronger trapping-regime limits from explosion energy, that are difficult to reconcile with a muon g-2 explanation.
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GeV-scale thermal dark matter from dark photons: tightly constrained, yet allowed
In a dark-photon-mediated Dirac fermionic DM model, only narrow resonant regions with small dark-sector coupling allow the candidate to saturate the full relic density while evading current direct and indirect detection bounds.
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Shedding Stray Light on Decaying Light Dark Matter: Constraints from NuSTAR X-ray Observations
NuSTAR stray-light data yields the strongest indirect bounds on decaying electrophilic scalar, ALP, and dark photon DM in the 6-70 keV range, plus inelastic DM with mass splittings 3-100 keV.
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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.