%0 Journal Article
%T CMB and Lyman-alpha constraints on dark matter decays to photons
%A Capozzi, F.
%A Ferreira, R. Z.
%A Lopez-Honorez, L.
%A Mena, O.
%J Journal of Cosmology and Astroparticle Physics
%D 2023
%V 06
%N 6
%I IOP Publishing Ltd
%@ 1475-7516
%G English
%F Capozzi_etal2023
%O WOS:001025410500001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5584), last updated on Wed, 02 Aug 2023 07:14:47 +0000
%X Dark matter energy injection in the early universe modifies both the ionization history and the temperature of the intergalactic medium. In this work, we improve the CMB bounds on sub-keV dark matter and extend previous bounds from Lyman-& alpha; observations to the same mass range, resulting in new and competitive constraints on axion-like particles (ALPs) decaying into two photons. The limits depend on the underlying reionization history, here accounted self-consistently by our modified version of the publicly available DarkHistory and CLASS codes. Future measurements such as the ones from the CMB-S4 experiment may play a crucial, leading role in the search for this type of light dark matter candidates.
%K reionization
%K axions
%K cosmological parameters from CMBR
%K dark matter theory
%R 10.1088/1475-7516/2023/06/060
%U https://arxiv.org/abs/2303.07426
%U https://doi.org/10.1088/1475-7516/2023/06/060
%P 060-23pp