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arXiv · 2209.03371

Axion Dark Matter from Lepton flavor-violating Decays

Paolo Panci·Diego Redigolo·Thomas Schwetz·Robert Ziegler
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Abstract

We propose simple scenarios where lepton flavor-violating couplings generate the observed dark matter abundance through freeze-in of an axion-like particle with mass in the few keV range. Compared to flavor-diagonal freeze-in, this mechanism enhances dark matter stability, softens stellar cooling constraints and improves the experimental sensitivity of accelerator-based searches. These scenarios can be tested by future X-ray telescopes, and in some cases will be almost entirely probed by new searches for lepton flavor violation at high-intensity experiments such as Mu3e and MEG II.

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Paolo Panci, Diego Redigolo, Thomas Schwetz, Robert Ziegler. 2022-09-07. Axion Dark Matter from Lepton flavor-violating Decays. https://doi.org/10.1016/j.physletb.2023.137919

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