Searching for Dark Matter in the CMB:
A Compact Parameterization of Energy Injection from New Physics
Douglas P. Finkbeiner, Silvia Galli, Tongyan Lin, & Tracy R. Slatyer 2011
Energy Injection And Absorption In The Cosmic Dark Ages
Tracy R. Slatyer 2012
Indirect Dark Matter Signatures In The Cosmic Dark Ages
Tracy R. Slatyer 2015
This work demonstrates how to estimate the Planck-based CMB bounds on arbitrary models of (s-wave) annihilating dark matter (Paper I). More generally (Paper II), it provides the detailed breakdown of the low-energy electrons and photons produced by high-energy photons, electrons and positrons injected into the universe during the cosmic dark ages, and an estimate of the resulting ionization, heating and spectral distortion.
General Constraints on Dark Matter Decay from the Cosmic Microwave Background
Tracy R. Slatyer and Chih-Liang Wu 2016
This work demonstrates how to estimate the Planck-based CMB bounds on arbitrary models of decaying dark matter (or other metastable species).