Built on

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Similar

G. F. Abellan, R. Murgia, V. Poulin, and J. Lavalle, “Hints for decaying dark matter from S 8 S_{8} measurements,” arXiv:2008.09615 [astro-ph.CO]
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K. Arisaka, P. Beltrame, C. Ghag, J. Kaidi, K. Lung, A. Lyashenko, R. Peccei, P. Smith, and K. Ye, “Expected Sensitivity to Galactic/Solar Axions and Bosonic Super-WIMPs based on the Axio-electric Effect in Liquid Xenon Dark Matter Detectors,” Astropart. Phys
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J. Redondo, “Solar axion flux from the axion-electron coupling,” JCAP
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Then

G. Blackadder and S. M. Koushiappas, “Cosmological constraints to dark matter with two- and many-body decays,” Phys. Rev. D
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V. Poulin, P. D. Serpico, and J. Lesgourgues, “A fresh look at linear cosmological constraints on a decaying dark matter component,” JCAP
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N. Evans, J. Sanders, and A. Geringer-Sameth, “Simple J-Factors and D-Factors for Indirect Dark Matter Detection,” Phys. Rev. D
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V. Bonnivard, D. Maurin, and M. G. Walker, “Contamination of stellar-kinematic samples and uncertainty about dark matter annihilation profiles in ultrafaint dwarf galaxies: the example of Segue I,” Mon. Not. Roy. Astron. Soc
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2020

Galactic Origin of Relativistic Bosons and XENON1T Excess

Buch, Jatan, Buen-Abad, Manuel A., Fan, JiJi et al.

Understand

We entertain the exotic possibility that dark matter (DM) decays or annihilations taking place in our galaxy may produce a flux of relativistic very weakly-coupled bosons, axions or dark photons.

We show that there exist several upper bounds for this flux on Earth assuming generic minimal requirements for DM, such as a lifetime longer than the age of the Universe or an annihilation rate that leaves unaffected the background evolution during matter domination.
These bounds do not depend on the identity or the couplings of the bosons.
We then show that this new flux cannot be large enough to explain the recent XENON1T excess, while assuming that the bosons' couplings to the Standard Model are consistent with all current experimental and observational constraints.