http://arxiv.org/abs/1602.08121
It has been recently suggested that emerging tension between cosmological parameter values derived in high redshift (CMB anisotropy) and low redshift (cluster counts, Hubble constant) measurements can be reconciled in a model which contains subdominant fraction of dark matter decaying after recombination. We check the model against the CMB Planck data. We find that lensing of CMB anisotropies by the Large Scale Structure gives strong extra constraints on this model, limiting the fraction as F<8% at 2 sigma confidence level. However, investigating the combined data set of CMB and conflicting low z measurements, we obtain that the model with F=2-5 % exhibits better fit (by 1.5-3 sigma depending on the lensing priors) as compared to that of the concordance LambdaCDM cosmological model.
A. Chudaykin, D. Gorbunov and I. Tkachev
Mon, 29 Feb 16
44/46
Comments: 5 pages, 4 figures
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