Anapole dark matter

  title={Anapole dark matter},
  author={Chiu Man Ho and Robert J. Scherrer},
  journal={Physics Letters B},
Abstract We consider dark matter (DM) that interacts with ordinary matter exclusively through an electromagnetic anapole, which is the only allowed electromagnetic form factor for Majorana fermions. We show that unlike DM particles with an electric or magnetic dipole moment, anapole dark matter particles annihilate exclusively into fermions via purely p-wave interactions, while tree-level annihilations into photons are forbidden. We calculate the anapole moment needed to produce a thermal relic… Expand

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