TY  - JOUR
AU  - Capozzi, F.
AU  - Ferreira, R. Z.
AU  - Lopez-Honorez, L.
AU  - Mena, O.
PY  - 2023
DA  - 2023//
TI  - CMB and Lyman-alpha constraints on dark matter decays to photons
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 060
EP  - 23pp
VL  - 06
IS  - 6
PB  - IOP Publishing Ltd
KW  - reionization
KW  - axions
KW  - cosmological parameters from CMBR
KW  - dark matter theory
AB  - 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.
SN  - 1475-7516
UR  - https://arxiv.org/abs/2303.07426
UR  - https://doi.org/10.1088/1475-7516/2023/06/060
DO  - 10.1088/1475-7516/2023/06/060
LA  - English
N1  - WOS:001025410500001
ID  - Capozzi_etal2023
ER  -