@article{TEXTUAL,
      recid = {12125},
      author = {Krnjaic, Gordan and Rocha, Duncan and Sokolenko,  Anastasia},
      title = {Freezing in vector dark matter through magnetic dipole  interactions},
      journal = {Physical Review D},
      address = {2023-08-28},
      number = {TEXTUAL},
      abstract = {We study a simple model of vector dark matter that couples  to Standard Model particles via magnetic dipole  interactions. In this scenario, the cosmological abundance  arises through the freeze-in mechanism and depends on the  dipole coupling, the vector mass, and the reheat  temperature. To ensure cosmological metastability, the  vector must be lighter than the fermions to which it  couples, but rare decays can still produce observable $3γ$  final states; two-body decays can also occur at one loop  with additional weak suppression, but are subdominant if  the vector couples mainly to light fermions. For  sufficiently heavy vectors, induced kinetic mixing with the  photon can also yield additional two-body decays to lighter  fermions and predict indirect detection signals through  final-state radiation. We explore the implications of  couplings to various flavors of visible particles and  emphasize leptophilic dipoles involving electrons, muons,  and taus, which offer the most promising indirect detection  signatures through $3γ$, $e^+e^-γ$, and $μ^+μ^-γ$ decay  channels. We also present constraints from current and past  telescopes, and sensitivity projections for future missions  including e-ASTROGAM and AMEGO.},
      url = {http://knowledge.uchicago.edu/record/12125},
}