TY - JOUR
T1 - Axion dark matter from lepton flavor-violating decays
AU - Panci, Paolo
AU - Redigolo, Diego
AU - Schwetz, Thomas
AU - Ziegler, Robert
N1 - Publisher Copyright:
© 2023 The Author(s)
PY - 2023/6/10
Y1 - 2023/6/10
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85152723552&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2023.137919
DO - 10.1016/j.physletb.2023.137919
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AN - SCOPUS:85152723552
SN - 0370-2693
VL - 841
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 137919
ER -