Built on

K. L. Pandey, T. Karwal, and S. Das, “Alleviating the H 0 H_{0} and σ 8 \sigma_{8} anomalies with a decaying dark matter model,” JCAP
Original
1902
Earlier work this paper cites.
K. Vattis, S. M. Koushiappas, and A. Loeb, “Dark matter decaying in the late Universe can relieve the H0 tension,” Phys. Rev. D
Original
1903
Earlier work this paper cites.
K. Enqvist, S. Nadathur, T. Sekiguchi, and T. Takahashi, “Constraints on decaying dark matter from weak lensing and cluster counts,” JCAP
Original
1906
Earlier work this paper cites.
L. Xiao, L. Zhang, R. An, C. Feng, and B. Wang, “Fractional Dark Matter decay: cosmological imprints and observational constraints,” JCAP
Original
1908
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A. H. G. Peter and A. J. Benson, “Dark-matter decays and Milky Way satellite galaxies,” Phys. Rev. D
Original
1912
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S. Aoyama, K. Ichiki, D. Nitta, and N. Sugiyama, “Formulation and constraints on decaying dark matter with finite mass daughter particles,” JCAP
Original
1984
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B. S. Haridasu and M. Viel, “Late-time decaying dark matter: constraints and implications for the H 0 H_{0} -tension,” Mon. Not. Roy. Astron. Soc
Original
2004
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Similar

N. Blinov, C. Keith, and D. Hooper, “Warm Decaying Dark Matter and the Hubble Tension,” JCAP
Original
2004
Cited alongside, same era.
S. J. Clark, K. Vattis, and S. M. Koushiappas, “Cosmological constraints on late-Universe decaying dark matter as a solution to the H 0 H_{0} tension,” Phys. Rev. D
Original
2006
Cited alongside, same era.
G. F. Abellan, R. Murgia, V. Poulin, and J. Lavalle, “Hints for decaying dark matter from S 8 S_{8} measurements,” arXiv:2008.09615 [astro-ph.CO]
Original
2008
Cited alongside, same era.
F. Borzumati, T. Bringmann, and P. Ullio, “Dark matter from late decays and the small-scale structure problems,” Phys. Rev. D
2008
Cited alongside, same era.
A. H. G. Peter, C. E. Moody, and M. Kamionkowski, “Dark-Matter Decays and Self-Gravitating Halos,” Phys. Rev. D

Then

S. Aoyama, T. Sekiguchi, K. Ichiki, and N. Sugiyama, “Evolution of perturbations and cosmological constraints in decaying dark matter models with arbitrary decay mass products,” JCAP
Original
2014
Later among the works it cites.
Z. Berezhiani, A. Dolgov, and I. Tkachev, “Reconciling Planck results with low redshift astronomical measurements,” Phys. Rev. D
Original
2015
Later among the works it cites.
V. Poulin, P. D. Serpico, and J. Lesgourgues, “A fresh look at linear cosmological constraints on a decaying dark matter component,” JCAP
Original
2016
Later among the works it cites.
A. Chudaykin, D. Gorbunov, and I. Tkachev, “Dark matter component decaying after recombination: Lensing constraints with Planck data,” Phys. Rev. D
Original
2016
Later among the works it cites.

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2020

Updated constraints on decaying cold dark matter

Nygaard, Andreas, Tram, Thomas, Hannestad, Steen

Understand

In this paper we update the constraints on the simple decaying cold dark matter (DCDM) model with dark radiation (DR) as decay product.

We consider two different regimes of the lifetime, i.e.
short-lived and long-lived, and use the most recent CMB data from Planck (2018) to infer new constraints on the decay parameters with which we compare the constraints inferred by the previous Planck data (2015).
We hereby show that the newest CMB data constrains the fractional amount of DCDM twice as much as the previous data in the long-lived regime, leading to our current best 2$\sigma$ upper bound of $f_{\rm dcdm}<2.44\%$.