Higgs decays as a window into the dark sector

@article{Davoudiasl2013HiggsDA,
  title={Higgs decays as a window into the dark sector},
  author={Hooman Davoudiasl and Hye-Sung Lee and Ian M. Lewis and William Joseph Marciano},
  journal={Physical Review D},
  year={2013},
  volume={88},
  pages={015022}
}
A light vector boson, Z_d, associated with a "dark sector" U(1)_d gauge group has been introduced to explain certain astrophysical observations as well as low energy laboratory anomalies. In such models, the Higgs boson may decay into X+Z_d, where X=Z, Z_d or \gamma. Here, we provide estimates of those decay rates as functions of the Z_d coupling through either mass-mixing (e.g. via an enlarged Higgs mechanism) or through heavy new fermion loops and examine the implied LHC phenomenology. Our… 

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