A dark matter component decaying after recombination: lensing constraints with Planck data
1 Institute for Nuclear Research of the Russian Academy of Sciences, Moscow 117312, Russia
2 Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia
3 Novosibirsk State University, Novosibirsk 630090, Russia
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Published online: 28 October 2016
It was recently proposed  that the model with a fraction of decaying cold dark matter is able to reconcile measurements in high redshift (CMB) and low redshift (probes of cluster abundance and the Hubble constant). We check this statement employing the full likelihood of CMB Planck data. We find that the lensing effect calculated from anisotropy spectra measured by Planck imposes the strong constraint on the fraction of unstable dark matter as F < 8% (2σ). However, combining the CMB data with conflicting measurements in low redshift we obtain that the model with F ≈ 2 − 5% improves the goodness-of-fit by 1.5 − 2σ depending on As and τ priors in comparison with the concordance ΛCDM model.
© The Authors, published by EDP Sciences, 2016
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