Abstract
Cosmic ray (CR) positron excess, known as the positron anomaly (PA), has been discovered more than ten years ago and still remains an unsolved astrophysical puzzle. There are a lot of models with decaying or annihilating dark matter (DM) particles trying to account for it. However, most of them fall under constraints of gamma radiation. Simple DM models tend to overproduce gammas, leading to contradiction with cosmic gamma-ray background. This work is dedicated to an attempt of alleviating this contradiction by modification of DM spatial distribution, namely in the form of transition from previously considered dark disk to a freshly proposed concentric rings model. The obtained results show this method to be a good way to make up the predictions with observations.
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ACKNOWLEDGEMENT
The work was performed with the financial support provided by the Russian Ministry of Science and Higher Education, project ‘‘Fundamental and applied research of cosmic rays’’, no. FSWU-2023-0068.
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Belotsky, K.M., Rakhimova, M.A. & Solovyov, M.L. Modified Dark Matter Spatial Distribution as Solution to Positron Anomaly Gamma-Ray Problem. Phys. Atom. Nuclei 86, 500–509 (2023). https://doi.org/10.1134/S1063778823040087
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DOI: https://doi.org/10.1134/S1063778823040087