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Late universe decaying dark matter can relieve the H_0 tension
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We study the cosmological effects of two-body dark matter decays where the products of the decay include a massless and a massive particle. We show that if the massive daughter particle is slightly warm it is possible to relieve the tension between distance ladder measurements of the present day Hubble parameter with measurements from the cosmic microwave background.
Forward citations
Cited by 13 Pith papers
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Interpreting the Hubble tension with a cascade decaying dark matter sector
A cascade decaying dark matter model combining early and late effects still cannot reduce the Hubble tension below about 3 sigma, and is statistically disfavored relative to Lambda CDM.
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hi_class: Background Evolution, Initial Conditions and Approximation Schemes
hi_class now evolves the background from covariant Horndeski Lagrangians, provides consistent radiation-era initial conditions for scalar perturbations, and applies a quasi-static approximation automatically where it is safe.
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Gravitational waves, CMB polarization, and the Hubble tension
The B-mode recombination peak, tied to the light horizon at last scattering, can act as an independent early-universe standard ruler, measurable to about 2% with stage-IV CMB experiments.
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Spherical Collapse and Halo Formation in a Cosmology with Decaying Dark Matter and a Semi-Cosmographic Dark Energy
In a decaying dark matter plus semi-cosmographic dark energy cosmology constrained by DESI BAO and ShapeFit, the spherical collapse threshold stays close to the ΛCDM value while massive halo abundance shows pronounced...
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Dark Neutrino interactions phase out the Hubble tension
Dark matter-neutrino interactions that block neutrino free streaming shift CMB acoustic peaks and reduce the Hubble tension from about 3.8σ to about 2.1σ in a fit to Planck and WiggleZ data.
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Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions
An interacting dark energy model with coupling proportional to the dark energy density alleviates the H0 and S8 tensions in Planck 2018 data but is not preferred once BAO and supernova data are included.
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Resolving Hubble Tension with Quintom Dark Energy Model
A small negative-density component with equation of state 1/3≤w≤1 can lift H0 from 67.4 to about 74, but the coupled quintom model realizing it either misses the CMB peak or gives H0=68.55.
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Fractional Dark Matter decay: cosmological imprints and observational constraints
Cosmological data limit a pre-recombination decaying dark matter fraction to at most about 2.7%, and future kSZ measurements could provide an independent test.
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Probing the independence within the dark sector in the fluid approximation
Current cosmological data show no statistically significant sign of an interaction between cold dark matter and dark energy, with LambdaCDM preferred, and future LSST and DESI data could constrain such a coupling at 2...
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Using the Kaniadakis horizon entropy in the presence of neutrinos to alleviate the Hubble and $ S_{8} $ Tensions
A Kaniadakis entropy cosmology with neutrinos shifts H0 and S8 toward intermediate values, but the entropy parameter is consistent with zero and the tensions are not clearly resolved.
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Cosmology With Low-Redshift Observations: No Signal For New Physics
Combining SN, BAO, lensing, cosmic chronometer, and growth data, the authors find ΛCDM remains the best dark energy model, with H0 and S8 consistent with most early and late universe probes within 2σ.
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Cosmological constraints in extended parameter space from the Planck 2018 Legacy release
Planck 2018 constraints in extended cosmological models show the A_L lensing anomaly persists, phantom dark energy with w<-1 can absorb the Hubble tension only when the local H0 prior is included, and neutrino mass bo...
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The Hubble tension: A decade review
Pure early or late fixes to the Hubble tension are tightly constrained; remaining options are combined early-late interacting dark energy or new physics at the local-to-homogeneous transition.
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