http://arxiv.org/abs/1711.06738
It has been recently suggested [Berezhiani:2015yta] that a subdominant fraction of dark matter decaying after recombination may alleviate tension between high-redshift (CMB anisotropy) and low-redshift (Hubble constant, cluster counts) measurements. In this report, we continue our previous study [Chudaykin:2016yfk] of the Decaying Dark Matter (DDM) model adding all available recent Baryon Acoustic Oscillation (BAO) and Redshift Space Distortions (RSD) measurements. We find, that the BAO/RSD measurements generically prefer the standard $\Lambda$CDM and impose an upper limit on the DDM fraction at the level of $\sim\,$5%, strengthening by a factor of 1.5 limits obtained in [Chudaykin:2016yfk] mostly from CMB data. However, the numbers vary from one analysis to other based on the same Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 (DR12) galaxy sample, and in particular cases the DDM model provides with even better fit to the cosmological data as compared to the $\Lambda$CDM. The improvement can be as large as 1.8$\,\sigma$ and grows to 3.3$\,\sigma$ when the CMB lensing power amplitude ${\rm
A_L}$ is introduced as a free fitting parameter.
A. Chudaykin, D. Gorbunov and I. Tkachev
Tue, 21 Nov 17
76/79
Comments: N/A