• Corpus ID: 255185948

Dark Photon Dark Matter from Cosmic Strings and Gravitational Wave Background

  title={Dark Photon Dark Matter from Cosmic Strings and Gravitational Wave Background},
  author={Naoya Kitajima and Kazunori Nakayama},
Dark photon dark matter may be produced by the cosmic strings in association with the dark U(1) gauge symmetry breaking. We perform three-dimensional lattice simulations of the Abelian-Higgs model and follow the evolution of cosmic strings. In particular, we simulate the case of (very) light vector boson and find that such vector bosons are efficiently produced by the collapse of small loops while the production is inefficient in the case of heavy vector boson. We calculate the spectrum of the… 

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